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BSD Family Tree

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  1. The UNIX system family tree: Research and BSD
  2. ---------------------------------------------
  3.  
  4. First Edition (V1)
  5. |
  6. Second Edition (V2)
  7. |
  8. Third Edition (V3)
  9. |
  10. Fourth Edition (V4)
  11. |
  12. Fifth Edition (V5)
  13. |
  14. Sixth Edition (V6) -----*
  15. \ |
  16. \ |
  17. \ |
  18. Seventh Edition (V7) |
  19. \ |
  20. \ 1BSD
  21. 32V |
  22. \ 2BSD---------------*
  23. \ / |
  24. \ / |
  25. \/ |
  26. 3BSD |
  27. | |
  28. 4.0BSD 2.79BSD
  29. | |
  30. 4.1BSD --------------> 2.8BSD
  31. | |
  32. 4.1aBSD -----------\ |
  33. | \ |
  34. 4.1bBSD \ |
  35. | \ |
  36. *------ 4.1cBSD --------------> 2.9BSD
  37. / | |
  38. Eighth Edition | 2.9BSD-Seismo
  39. | | |
  40. +----<--- 4.2BSD 2.9.1BSD
  41. | | |
  42. +----<--- 4.3BSD -------------> 2.10BSD
  43. | | / |
  44. Ninth Edition | / 2.10.1BSD
  45. | 4.3BSD Tahoe-----+ |
  46. | | \ |
  47. | | \ |
  48. v | 2.11BSD
  49. Tenth Edition | |
  50. | 2.11BSD rev #430
  51. 4.3BSD NET/1 |
  52. | v
  53. 4.3BSD Reno
  54. |
  55. *---------- 4.3BSD NET/2 -------------------+-------------*
  56. | | | |
  57. 386BSD 0.0 | | BSD/386 ALPHA
  58. | | | |
  59. 386BSD 0.1 ------------>+ | BSD/386 0.3.[13]
  60. | \ | 4.4BSD Alpha |
  61. | 386BSD 1.0 | | BSD/386 0.9.[34]
  62. | | 4.4BSD |
  63. | | / | |
  64. | | 4.4BSD-Encumbered | |
  65. | -NetBSD 0.8 | BSD/386 1.0
  66. | / | | |
  67. FreeBSD 1.0 <-----' NetBSD 0.9 | BSD/386 1.1
  68. | | .----- 4.4BSD Lite |
  69. FreeBSD 1.1 | / / | \ |
  70. | | / / | \ |
  71. FreeBSD 1.1.5 .---|--------' / | \ |
  72. | / | / | \ |
  73. FreeBSD 1.1.5.1 / | / | \ |
  74. | / NetBSD 1.0 <-' | \ |
  75. | / | | \ |
  76. FreeBSD 2.0 <--' | | BSD/OS 2.0
  77. | \ | |
  78. FreeBSD 2.0.5 \ | BSD/OS 2.0.1
  79. | .-----\------------- 4.4BSD Lite2 |
  80. | | \ | | | | |
  81. | | .-----|------Rhapsody | | | |
  82. | | | | NetBSD 1.3 | | |
  83. | | | | OpenBSD 2.3 | |
  84. | | | | BSD/OS 3.0 |
  85. FreeBSD 2.1 | | | |
  86. | | | | NetBSD 1.1 ------. BSD/OS 2.1
  87. | FreeBSD 2.1.5 | | | \ |
  88. | | | | NetBSD 1.2 \ BSD/OS 3.0
  89. | FreeBSD 2.1.6 | | | \ OpenBSD 2.0 |
  90. | | | | | \ | |
  91. | FreeBSD 2.1.6.1 | | | \ | |
  92. | | | | | \ | |
  93. | FreeBSD 2.1.7 | | | | | |
  94. | | | | | NetBSD 1.2.1 | |
  95. | FreeBSD 2.1.7.1 | | | | |
  96. | | | | | |
  97. | | | | | |
  98. *-FreeBSD 2.2 | | | | |
  99. | \ | | | | |
  100. | FreeBSD 2.2.1 | | | | |
  101. | | | | | | |
  102. | FreeBSD 2.2.2 | | | OpenBSD 2.1 |
  103. | | | | | | |
  104. | FreeBSD 2.2.5 | | | | |
  105. | | | | | OpenBSD 2.2 |
  106. | | | | NetBSD 1.3 | |
  107. | FreeBSD 2.2.6 | | | | | |
  108. | | | | | NetBSD 1.3.1 | BSD/OS 3.1
  109. | | | | | | OpenBSD 2.3 |
  110. | | | | | NetBSD 1.3.2 | |
  111. | FreeBSD 2.2.7 | | | | | |
  112. | | | | | | | BSD/OS 4.0
  113. | FreeBSD 2.2.8 | | | | | |
  114. | | | | | | | |
  115. | v | | | | OpenBSD 2.4 |
  116. | FreeBSD 2.2.9 | | | | | |
  117. | | | | | | |
  118. FreeBSD 3.0 <--------* | | v | |
  119. | | | NetBSD 1.3.3 | |
  120. *---FreeBSD 3.1 | | | |
  121. | | | | | BSD/OS 4.0.1
  122. | FreeBSD 3.2----* | NetBSD 1.4 OpenBSD 2.5 |
  123. | | | | | | | | |
  124. | | | | | | | | |
  125. | | | | | | | | |
  126. | FreeBSD 3.3 | | | | NetBSD 1.4.1 | |
  127. | | | | | | | OpenBSD 2.6 |
  128. | FreeBSD 3.4 | | | | | | |
  129. | | | | | | | | BSD/OS 4.1
  130. FreeBSD 4.0 | | | | | NetBSD 1.4.2 | |
  131. | | | | | | | | |
  132. | | | | | | | | |
  133. | FreeBSD 3.5 | | | | | OpenBSD 2.7 |
  134. | | | | | | | | |
  135. | FreeBSD 3.5.1 | | | | | | |
  136. | | | | | | | |
  137. *---FreeBSD 4.1 | | | | | | |
  138. | | | | (?) | | | |
  139. | FreeBSD 4.1.1 | | / | | | |
  140. | | | | / | | | |
  141. | FreeBSD 4.2 Darwin/ | NetBSD 1.4.3 | |
  142. | | Mac OS X | OpenBSD 2.8 BSD/OS 4.2
  143. | | | | | |
  144. | | | | | |
  145. | | 10.0 NetBSD 1.5 | |
  146. | FreeBSD 4.3 | | | | |
  147. | | | | | OpenBSD 2.9 |
  148. | | | | NetBSD 1.5.1 | |
  149. | | | | | | |
  150. | FreeBSD 4.4-. | | NetBSD 1.5.2 | |
  151. | | | Mac OS X | | | |
  152. | | | 10.1 | | OpenBSD 3.0 |
  153. | FreeBSD 4.5 | | | | | |
  154. | | \ | | | | BSD/OS 4.3
  155. | FreeBSD 4.6 \ | | | OpenBSD 3.1 |
  156. | | \ | | NetBSD 1.5.3 | |
  157. | FreeBSD 4.6.2 Mac OS X | | |
  158. | | 10.2 | | |
  159. | FreeBSD 4.7 | | | |
  160. | | | NetBSD 1.6 OpenBSD 3.2 |
  161. | FreeBSD 4.8 | | | | |
  162. | | | | NetBSD 1.6.1 | |
  163. | |--------. | | | OpenBSD 3.3 BSD/OS 5.0
  164. | | \ | | | | |
  165. | FreeBSD 4.9 | | | | OpenBSD 3.4 BSD/OS 5.1 ISE
  166. | | | | | | |
  167. | | | | | NetBSD 1.6.2 |
  168. | | | | | | |
  169. | | | | | | OpenBSD 3.5
  170. | | | | | v |
  171. | FreeBSD 4.10 | | | |
  172. | | | | | |
  173. | FreeBSD 4.11 | | | |
  174. | | | | |
  175. | `-|------|-----------------|---------------------.
  176. | | | | \
  177. FreeBSD 5.0 | | | |
  178. | | | | |
  179. FreeBSD 5.1 | | | DragonFly 1.0
  180. | \ | | | |
  181. | ----- Mac OS X | | |
  182. | 10.3 | | |
  183. FreeBSD 5.2 | | | |
  184. | | | | | |
  185. | FreeBSD 5.2.1 | | | |
  186. | | | | |
  187. *-------FreeBSD 5.3 | | | |
  188. | | | | OpenBSD 3.6 |
  189. | | | NetBSD 2.0 | |
  190. | | | | | | | DragonFly 1.2.0
  191. | | Mac OS X | | NetBSD 2.0.2 | |
  192. | | 10.4 | | | | |
  193. | FreeBSD 5.4 | | | | | |
  194. | | | | | | OpenBSD 3.7 |
  195. | | | | | NetBSD 2.0.3 | |
  196. | | | | | | | |
  197. *--FreeBSD | | | | v OpenBSD 3.8 |
  198. | 6.0 | | | | | |
  199. | | | | | \ | |
  200. | | | | | NetBSD 2.1 | |
  201. | | | | | | |
  202. | | | | NetBSD 3.0 | |
  203. | | | | | | | | DragonFly 1.4.0
  204. | | | | | | | OpenBSD 3.9 |
  205. | FreeBSD | | | | | | |
  206. | 6.1 | | | | | | |
  207. | | FreeBSD 5.5 | | | | | |
  208. | | | | | NetBSD 3.0.1 | DragonFly 1.6.0
  209. | | | | | | | |
  210. | | | | | | OpenBSD 4.0 |
  211. | | | | | NetBSD 3.0.2 | |
  212. | | | | NetBSD 3.1 | |
  213. | FreeBSD 6.2 | | | |
  214. | | | | | DragonFly 1.8.0
  215. | | | | OpenBSD 4.1 |
  216. | | | | | DragonFly 1.10.0
  217. | | Mac OS X | | |
  218. | | 10.5 | | |
  219. | | | | OpenBSD 4.2 |
  220. | | | NetBSD 4.0 | |
  221. | FreeBSD 6.3 | | | | |
  222. | \ | | | | |
  223. *--FreeBSD | | | | | DragonFly 1.12.0
  224. | 7.0 | | | | | |
  225. | | | | | | OpenBSD 4.3 |
  226. | | | | | NetBSD | DragonFly 2.0.0
  227. | | FreeBSD | | 4.0.1 OpenBSD 4.4 |
  228. | | 6.4 | | | |
  229. | | | | | |
  230. | FreeBSD 7.1 | | | |
  231. | | | | | DragonFly 2.2.0
  232. | FreeBSD 7.2 | NetBSD 5.0 OpenBSD 4.5 |
  233. | \ | | | \ | |
  234. | | Mac OS X | | \ | |
  235. | | 10.6 | | \ | |
  236. | | | | | NetBSD | DragonFly 2.4.0
  237. | | | | | 5.0.1 OpenBSD 4.6 |
  238. | | | | | | | |
  239. *--FreeBSD | | | | | | |
  240. | 8.0 | | | | | | |
  241. | | FreeBSD | | | NetBSD | |
  242. | | 7.3 | | | 5.0.2 | DragonFly 2.6.0
  243. | | | | | | OpenBSD 4.7 |
  244. | FreeBSD | | | | | |
  245. | 8.1 | | | | | |
  246. | | | | | | | DragonFly 2.8.2
  247. | | | | | | OpenBSD 4.8 |
  248. | | | | | *--NetBSD | |
  249. | FreeBSD FreeBSD | | | 5.1 | |
  250. | 8.2 7.4 | | | | | DragonFly 2.10.1
  251. | | | | | | OpenBSD 4.9 |
  252. | `-----. Mac OS X | | | | |
  253. | \ 10.7 | | | | |
  254. | | | | | | OpenBSD 5.0 |
  255. *--FreeBSD | | | | | | |
  256. | 9.0 | | | | NetBSD | DragonFly 3.0.1
  257. | | FreeBSD | | | 5.1.2 | |
  258. | | 8.3 | | | | | |
  259. | | | | | | NetBSD | |
  260. | | | | | | 5.1.3 | |
  261. | | | | | | | | |
  262. | | | | | | NetBSD | |
  263. | | | | | | 5.1.4 | |
  264. | | | | | | OpenBSD 5.1 |
  265. | | | Mac OS X | `----. | |
  266. | | | 10.8 | \ | |
  267. | | | | NetBSD 6.0 | | |
  268. | | | | | | | | OpenBSD 5.2 DragonFly 3.2.1
  269. | FreeBSD | | | | | NetBSD | |
  270. | 9.1 | | | | | 5.2 | |
  271. | | | | | | | | | |
  272. | | | | | | | NetBSD | |
  273. | | | | | | | 5.2.1 | |
  274. | | | | | | | | | |
  275. | | | | | | | NetBSD | |
  276. | | | | | | | 5.2.2 | |
  277. | | | | | | | | |
  278. | | | | | | \ | |
  279. | | | | | | NetBSD | |
  280. | | | | | | 6.0.1 | |
  281. | | | | | | | OpenBSD 5.3 DragonFly 3.4.1
  282. | | | | | | NetBSD | |
  283. | | | | | | 6.0.2 | |
  284. | | | | | | | | |
  285. | | | | | | NetBSD | |
  286. | | | | | | 6.0.3 | |
  287. | | | | | | | | |
  288. | | | | | | NetBSD | |
  289. | | | | | | 6.0.4 | |
  290. | | | | | | | | |
  291. | | | | | | NetBSD | |
  292. | | | | | | 6.0.5 | |
  293. | | | | | | | |
  294. | | | | | |`-NetBSD 6.1 | |
  295. | | FreeBSD | | | | |
  296. | | 8.4 | | NetBSD 6.1.1 | |
  297. | | | | | | |
  298. | FreeBSD | | NetBSD 6.1.2 | |
  299. | 9.2 Mac OS X | | | |
  300. | | 10.9 | | OpenBSD 5.4 |
  301. | `-----. | | | | DragonFly 3.6.0
  302. | \ | | | | |
  303. *--FreeBSD | | | NetBSD 6.1.3 | |
  304. | 10.0 | | | | | |
  305. | | | | | | | DragonFly 3.6.1
  306. | | | | | | | |
  307. | | | | | | | |
  308. | | | | | | | DragonFly 3.6.2
  309. | | | | | NetBSD 6.1.4 | |
  310. | | | | | | | |
  311. | | | | | | OpenBSD 5.5 |
  312. | | | | | | | |
  313. | | | | | | | DragonFly 3.8.0
  314. | | | | | | | |
  315. | | | | | | | |
  316. | | | | | | | DragonFly 3.8.1
  317. | | | | | | | |
  318. | | | | | | | |
  319. | | | | | | | DragonFly 3.6.3
  320. | | | | | | | |
  321. | | FreeBSD | | | | |
  322. | | 9.3 | | | | |
  323. | | | | NetBSD 6.1.5 | DragonFly 3.8.2
  324. | | Mac OS X | | |
  325. | | 10.10 | | |
  326. | | | | OpenBSD 5.6 |
  327. | FreeBSD | | | |
  328. | 10.1 | | | DragonFly 4.0.1
  329. | | | | | |
  330. | | | | | DragonFly 4.0.2
  331. | | | | | |
  332. | | | | | DragonFly 4.0.3
  333. | | | | | |
  334. | | | | | DragonFly 4.0.4
  335. | | | | | |
  336. | | | | | DragonFly 4.0.5
  337. | | | | | |
  338. | | | | OpenBSD 5.7 |
  339. | | | | | DragonFly 4.2.0
  340. | FreeBSD | | | |
  341. | 10.2 | | | |
  342. | | OS X NetBSD 7.0 | |
  343. | | 10.11 | OpenBSD 5.8 |
  344. | | | | | DragonFly 4.4.1
  345. | FreeBSD | | OpenBSD 5.9 |
  346. | 10.3 | | | |
  347. | | NetBSD 7.0.1 | |
  348. | | | | DragonFly 4.6.0
  349. | | | | |
  350. | | | | |
  351. *--FreeBSD macOS | OpenBSD 6.0 |
  352. | 11.0 10.12 | | |
  353. | | NetBSD 7.1 | |
  354. | | | | DragonFly 4.8.0
  355. | | | | |
  356. FreeBSD 12 -current | NetBSD -current OpenBSD -current DragonFly -current
  357. | | | | |
  358. v v v v v
  359.  
  360. Time
  361. ----------------
  362.  
  363. Time tolerance +/- 6 months, depending on which book/article you read; if it
  364. was the announcement in Usenet or if it was available as tape.
  365.  
  366. [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
  367. and John Quarterman. The Design and Implementation of
  368. the 4.4BSD Operating System.
  369. [APL] Apple website [http://www.apple.com/macosx/]
  370. [BSDI] Berkeley Software Design, Inc.
  371. [DFB] DragonFlyBSD Project, The.
  372. [DOC] README, COPYRIGHT on tape.
  373. [FBD] FreeBSD Project, The.
  374. [KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
  375. Volume 11, Info 4, April, 1987.
  376. [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
  377. comp.bugs.4bsd.ucb-fixes, June 15, 1988.
  378. [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
  379. Changes in the Kernel in 2.9BSD. Second Berkeley Software
  380. Distribution UNIX Version 2.9, July, 1983.
  381. [NBD] NetBSD Project, The.
  382. [OBD] OpenBSD Project, The.
  383. [QCU] Salus, Peter H. A quarter century of UNIX.
  384. [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
  385. [TUHS] The Unix Historical Society. http://minnie.tuhs.org/Unix_History/.
  386. [USE] Usenet announcement.
  387. [WRS] Wind River Systems, Inc.
  388. [dmr] Dennis Ritchie, via E-Mail
  389.  
  390. Multics 1965
  391. UNIX Summer 1969
  392. DEC PDP-7
  393. First Edition 1971-11-03 [QCU]
  394. DEC PDP-11/20, Assembler
  395. Second Edition 1972-06-12 [QCU]
  396. 10 UNIX installations
  397. Third Edition 1973-02-xx [QCU]
  398. Pipes, 16 installations
  399. Fourth Edition 1973-11-xx [QCU]
  400. rewriting in C effected,
  401. above 30 installations
  402. Fifth Edition 1974-06-xx [QCU]
  403. above 50 installations
  404. Sixth Edition 1975-05-xx [QCU]
  405. port to DEC Vax
  406. Seventh Edition 1979-01-xx [QCU]
  407. first portable UNIX
  408. Eighth Edition 1985-02-xx [QCU]
  409. VAX 11/750, VAX 11/780 [dmr]
  410. descended from 4.1c BSD [dmr]
  411. descended from 4.1 BSD [44B]
  412. scooping-out and replacement of the character-device
  413. and networking part by the streams mechanism
  414.  
  415. Ninth Edition 1986-09-xx [QCU]
  416. Tenth Edition 1989-10-xx [QCU]
  417.  
  418. 1BSD late 1977
  419. 1978-03-09 [QCU]
  420. PDP-11, Pascal, ex(1)
  421. 30 free copies of 1BSD sent out
  422. 35 tapes sold for 50 USD [QCU]
  423. 2BSD mid 1978 [QCU] 1979-05-10 [TUHS]
  424. 75 2BSD tapes shipped
  425. 2.79BSD 1980-04-xx [TUHS]
  426. 2.8BSD 1981-07-xx [KSJ]
  427.  
  428. 2.8.1BSD 1982-01-xx [QCU]
  429. set of performance improvements
  430. 2.9BSD 1983-07-xx [KSJ]
  431. 2.9.1BSD 1983-11-xx [TUHS]
  432. 2.9BSD-Seismo 1985-08-xx [SMS]
  433. 2.10BSD 1987-04-xx [KKK]
  434. 2.10.1BSD 1989-01-xx [SMS]
  435. 2.11BSD 1992-02-xx [SMS]
  436. 2.11BSD rev #430 1999-12-13 [SMS]
  437.  
  438. 32V 1978-1[01]-xx [QCU]
  439. 3BSD late 1979 [QCU] March 1980 [TUHS]
  440. virtual memory, page replacement,
  441. demand paging
  442. 4.0BSD 1980-10-xx
  443. 4.1BSD 1981-07-08 [DOC]
  444. 4.1aBSD 1982-04-xx
  445. alpha release, 100 sites, networking [44B]
  446. 4.1bBSD internal release, fast filesystem [44B]
  447. 4.1cBSD late 1982
  448. beta release, IPC [44B]
  449. 4.2BSD 1983-09-xx [QCU]
  450. 1983-08-03 [DOC]
  451. 4.3BSD 1986-06-xx [QCU]
  452. 1986-04-05 [KB], [DOC]
  453. 4.3BSD Tahoe 1988-06-15 [QCU], [DOC]
  454. 4.3BSD NET/1 1988-11-xx [QCU]
  455. 1989-01-01 [DOC]
  456. 4.3BSD Reno 1990-06-29 [QCU], [DOC]
  457. 4.3BSD NET/2 1991-06-28 [QCU], [DOC]
  458.  
  459. BSD/386 ALPHA 1991-12-xx [BSDI]
  460. first code released to people outside BSDI
  461. 386BSD 0.0 1992-02-xx [DOC]
  462. BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
  463. BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
  464. 386BSD 0.1 1992-07-28 [DOC]
  465. 4.4BSD Alpha 1992-07-07
  466. BSD/386 0.9.3 1992-10-xx [BSDI]
  467. first external gamma; G customers
  468. BSD/386 0.9.4 1992-12-xx [BSDI]
  469. would have been 1.0 except for request
  470. for preliminary injunction
  471. BSD/386 1.0 1993-03-xx [BSDI]
  472. injunction denied; first official release
  473. NetBSD 0.8 1993-04-20 [NBD]
  474. 4.4BSD 1993-06-01 [USE]
  475. NetBSD 0.9 1993-08-23 [NBD]
  476. FreeBSD 1.0 1993-11-01 [FBD]
  477. FreeBSD 1.0.2 1993-11-14 [FBD]
  478. supersedes 1.0 13 days after release.
  479. BSD/386 1.1 1994-02-xx [BSDI]
  480. 4.4BSD Lite 1994-03-01 [USE]
  481. FreeBSD 1.1 1994-05-07 [FBD]
  482. FreeBSD 1.1.5 1994-06-30 [FBD]
  483. FreeBSD 1.1.5.1 1994-07-05 [FBD]
  484. supersedes 1.1.5 5 days after release.
  485. NetBSD 1.0 1994-10-26 [NBD]
  486. 386BSD 1.0 1994-11-12 [USE]
  487. FreeBSD 2.0 1994-11-23 [FBD]
  488. BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
  489. FreeBSD 2.0.5 1995-06-10 [FBD]
  490. BSD/OS 2.0.1 1995-06-xx [BSDI]
  491. 4.4BSD Lite Release 2 1995-06-xx [44B]
  492. the true final distribution from the CSRG
  493. FreeBSD 2.1.0 1995-11-19 [FBD]
  494. NetBSD 1.1 1995-11-26 [NBD]
  495. BSD/OS 2.1 1996-01-xx [BSDI]
  496. FreeBSD 2.1.5 1996-07-14 [FBD]
  497. NetBSD 1.2 1996-10-04 [NBD]
  498. OpenBSD 2.0 1996-10-18 [OBD]
  499. FreeBSD 2.1.6 1996-11-16 [FBD]
  500. FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
  501. Rhapsody 1997-xx-xx
  502. FreeBSD 2.1.7 1997-02-20 [FBD]
  503. BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
  504. FreeBSD 2.2.0 1997-03-16 [FBD]
  505. FreeBSD 2.2.1 1997-03-25 [FBD]
  506. FreeBSD 2.2.2 1997-05-16 [FBD]
  507. NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
  508. OpenBSD 2.1 1997-06-01 [OBD]
  509. FreeBSD 2.2.5 1997-10-22 [FBD]
  510. OpenBSD 2.2 1997-12-01 [OBD]
  511. NetBSD 1.3 1998-01-04 [NBD]
  512. FreeBSD 2.2.6 1998-03-25 [FBD]
  513. NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
  514. BSD/OS 3.1 1998-03-xx [BSDI]
  515. OpenBSD 2.3 1998-05-19 [OBD]
  516. NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
  517. FreeBSD 2.2.7 1998-07-22 [FBD]
  518. BSD/OS 4.0 1998-08-xx [BSDI]
  519. 2-lock MP support, ELF executables
  520. FreeBSD 3.0 1998-10-16 [FBD]
  521. FreeBSD-3.0 is a snapshot from -current,
  522. while 3.1 and 3.2 are from 3.x-stable which
  523. was branched quite some time after 3.0-release
  524. FreeBSD 2.2.8 1998-11-29 [FBD]
  525. OpenBSD 2.4 1998-12-01 [OBD]
  526. NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
  527. FreeBSD 3.1 1999-02-15 [FBD]
  528. BSD/OS 4.0.1 1999-03-xx [BSDI]
  529. NetBSD 1.4 1999-05-12 [NBD]
  530. FreeBSD 3.2 1999-05-17 [FBD]
  531. OpenBSD 2.5 1999-05-19 [OBD]
  532. NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
  533. FreeBSD 3.3 1999-09-17 [FBD]
  534. OpenBSD 2.6 1999-12-01 [OBD]
  535. FreeBSD 3.4 1999-12-20 [FBD]
  536. BSD/OS 4.1 1999-12-xx [BSDI]
  537. FreeBSD 4.0 2000-03-13 [FBD]
  538. NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
  539. OpenBSD 2.7 2000-06-15 [OBD]
  540. FreeBSD 3.5 2000-06-24 [FBD]
  541. FreeBSD 4.1 2000-07-27 [FBD]
  542. FreeBSD 3.5.1 2000-07-28 [FBD]
  543. FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
  544. FreeBSD 4.2 2000-11-21 [FBD]
  545. NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
  546. BSD/OS 4.2 2000-11-29 [BSDI]
  547. OpenBSD 2.8 2000-12-01 [OBD]
  548. NetBSD 1.5 2000-12-06 [NBD]
  549. Mac OS X 10.0 2001-03-24 [APL]
  550. FreeBSD 4.3 2001-04-20 [FBD]
  551. OpenBSD 2.9 2001-06-01 [OBD]
  552. NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
  553. NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
  554. FreeBSD 4.4 2001-09-18 [FBD]
  555. Mac OS X 10.1 2001-09-29 [APL]
  556. OpenBSD 3.0 2001-12-01 [OBD]
  557. FreeBSD 4.5 2002-01-29 [FBD]
  558. BSD/OS 4.3 2002-03-14 [WRS]
  559. OpenBSD 3.1 2002-05-19 [OBD]
  560. FreeBSD 4.6 2002-06-15 [FBD]
  561. NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
  562. FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
  563. Mac OS X 10.2 2002-08-23 [APL]
  564. NetBSD 1.6 2002-09-14 [NBD]
  565. FreeBSD 4.7 2002-10-08 [FBD]
  566. OpenBSD 3.2 2002-11-01 [OBD]
  567. FreeBSD 5.0 2003-01-17 [FBD]
  568. FreeBSD 5.0 is a separate branch off of
  569. -current, similar to 3.0.
  570. FreeBSD 4.8 2003-04-03 [FBD]
  571. NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
  572. OpenBSD 3.3 2003-05-01 [OBD]
  573. BSD/OS 5.0 2003-05-?? [WRS]
  574. FreeBSD 5.1 2003-06-09 [FBD]
  575. Mac OS X 10.3 2003-10-24 [APL]
  576. FreeBSD 4.9 2003-10-28 [FBD]
  577. BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
  578. OpenBSD 3.4 2003-11-01 [OBD]
  579. FreeBSD 5.2 2004-01-12 [FBD]
  580. FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
  581. NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
  582. OpenBSD 3.5 2004-04-01 [OBD]
  583. FreeBSD 4.10 2004-05-27 [FBD]
  584. DragonFly 1.0 2004-07-12 [DFB]
  585. OpenBSD 3.6 2004-10-29 [OBD]
  586. FreeBSD 5.3 2004-11-06 [FBD]
  587. NetBSD 2.0 2004-12-09 [NBD]
  588. FreeBSD 4.11 2005-01-25 [FBD]
  589. DragonFly 1.2.0 2005-04-08 [DFB]
  590. NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
  591. Mac OS X 10.4 2005-04-29 [APL]
  592. FreeBSD 5.4 2005-05-09 [FBD]
  593. OpenBSD 3.7 2005-05-19 [OBD]
  594. NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
  595. OpenBSD 3.8 2005-11-01 [OBD]
  596. FreeBSD 6.0 2005-11-01 [FBD]
  597. NetBSD 2.1 2005-11-02 [NBD]
  598. NetBSD 3.0 2005-12-23 [NBD]
  599. DragonFly 1.4.0 2006-01-08 [DFB]
  600. FreeBSD 2.2.9 2006-04-01 [FBD]
  601. OpenBSD 3.9 2006-05-01 [OBD]
  602. FreeBSD 6.1 2006-05-08 [FBD]
  603. FreeBSD 5.5 2006-05-25 [FBD]
  604. NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
  605. DragonFly 1.6.0 2006-07-24 [DFB]
  606. OpenBSD 4.0 2006-11-01 [OBD]
  607. NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
  608. NetBSD 3.1 2006-11-04 [NBD]
  609. FreeBSD 6.2 2007-01-15 [FBD]
  610. DragonFly 1.8.0 2007-01-30 [DFB]
  611. OpenBSD 4.1 2007-05-01 [OBD]
  612. DragonFly 1.10.0 2007-08-06 [DFB]
  613. Mac OS X 10.5 2007-10-26 [APL]
  614. OpenBSD 4.2 2007-11-01 [OBD]
  615. NetBSD 4.0 2007-12-19 [NBD]
  616. FreeBSD 6.3 2008-01-18 [FBD]
  617. DragonFly 1.12.0 2008-02-26 [DFB]
  618. FreeBSD 7.0 2008-02-27 [FBD]
  619. OpenBSD 4.3 2008-05-01 [OBD]
  620. DragonFly 2.0.0 2008-07-21 [DFB]
  621. OpenBSD 4.4 2008-11-01 [OBD]
  622. FreeBSD 6.4 2008-11-28 [FBD]
  623. FreeBSD 7.1 2009-01-04 [FBD]
  624. DragonFly 2.2.0 2009-02-17 [DFB]
  625. NetBSD 5.0 2009-04-29 [NBD]
  626. OpenBSD 4.5 2009-05-01 [OBD]
  627. FreeBSD 7.2 2009-05-04 [FBD]
  628. Mac OS X 10.6 2009-06-08 [APL]
  629. NetBSD 5.0.1 2009-08-02 [NBD] (security/critical release)
  630. DragonFly 2.4.0 2009-09-16 [DFB]
  631. OpenBSD 4.6 2009-10-18 [OBD]
  632. FreeBSD 8.0 2009-11-26 [FBD]
  633. NetBSD 5.0.2 2010-02-12 [NBD] (security/critical release)
  634. FreeBSD 7.3 2010-03-23 [FBD]
  635. DragonFly 2.6.0 2010-03-28 [DFB]
  636. OpenBSD 4.7 2010-05-19 [OBD]
  637. FreeBSD 8.1 2010-07-24 [FBD]
  638. DragonFly 2.8.2 2010-10-30 [DFB]
  639. OpenBSD 4.8 2010-11-01 [OBD]
  640. NetBSD 5.1 2010-11-19 [NBD]
  641. FreeBSD 7.4 2011-02-24 [FBD]
  642. FreeBSD 8.2 2011-02-24 [FBD]
  643. DragonFly 2.10.1 2011-04-26 [DFB]
  644. OpenBSD 4.9 2011-05-01 [OBD]
  645. Mac OS X 10.7 2011-07-20 [APL]
  646. OpenBSD 5.0 2011-11-01 [OBD]
  647. FreeBSD 9.0 2012-01-12 [FBD]
  648. NetBSD 5.1.2 2012-02-02 [NBD] (security/critical release)
  649. DragonFly 3.0.1 2012-02-21 [DFB]
  650. FreeBSD 8.3 2012-04-18 [FBD]
  651. OpenBSD 5.1 2012-05-01 [OBD]
  652. Mac OS X 10.8 2012-07-25 [APL]
  653. NetBSD 6.0 2012-10-17 [NBD]
  654. OpenBSD 5.2 2012-11-01 [OBD]
  655. DragonFly 3.2.1 2012-11-02 [DFB]
  656. NetBSD 5.2 2012-12-03 [NBD]
  657. NetBSD 6.0.1 2012-12-26 [NBD] (security/critical release)
  658. FreeBSD 9.1 2012-12-30 [FBD]
  659. DragonFly 3.4.1 2013-04-29 [DFB]
  660. OpenBSD 5.3 2013-05-01 [OBD]
  661. NetBSD 6.0.2 2013-05-18 [NBD] (security/critical release)
  662. NetBSD 6.1 2013-05-18 [NBD]
  663. FreeBSD 8.4 2013-06-07 [FBD]
  664. NetBSD 6.1.1 2013-08-22 [NBD]
  665. NetBSD 5.1.3 2013-09-29 [NBD]
  666. NetBSD 5.2.1 2013-09-29 [NBD]
  667. FreeBSD 9.2 2013-09-30 [FBD]
  668. NetBSD 6.0.3 2013-09-30 [NBD]
  669. NetBSD 6.1.2 2013-09-30 [NBD]
  670. Mac OS X 10.9 2013-10-22 [APL]
  671. OpenBSD 5.4 2013-11-01 [OBD]
  672. DragonFly 3.6.0 2013-11-25 [DFB]
  673. FreeBSD 10.0 2014-01-20 [FBD]
  674. NetBSD 5.1.4 2014-01-25 [NBD]
  675. NetBSD 5.2.2 2014-01-25 [NBD]
  676. NetBSD 6.0.4 2014-01-25 [NBD]
  677. NetBSD 6.1.3 2014-01-25 [NBD]
  678. DragonFly 3.6.1 2014-02-22 [DFB]
  679. DragonFly 3.6.2 2014-04-10 [DFB]
  680. NetBSD 6.0.5 2014-04-12 [NDB]
  681. NetBSD 6.1.4 2014-04-12 [NDB]
  682. OpenBSD 5.5 2014-05-01 [OBD]
  683. DragonFly 3.8.0 2014-06-04 [DFB]
  684. DragonFly 3.8.1 2014-06-16 [DFB]
  685. DragonFly 3.6.3 2014-06-17 [DFB]
  686. FreeBSD 9.3 2014-07-05 [FBD]
  687. DragonFly 3.8.2 2014-08-08 [DFB]
  688. NetBSD 6.1.5 2014-09-22 [NBD]
  689. Mac OS X 10.10 2014-10-16 [APL]
  690. OpenBSD 5.6 2014-11-01 [OBD]
  691. FreeBSD 10.1 2014-11-14 [FBD]
  692. DragonFly 4.0.1 2014-11-25 [DFB]
  693. DragonFly 4.0.2 2015-01-07 [DFB]
  694. DragonFly 4.0.3 2015-01-21 [DFB]
  695. DragonFly 4.0.4 2015-03-09 [DFB]
  696. DragonFly 4.0.5 2015-03-23 [DFB]
  697. OpenBSD 5.7 2015-05-01 [OBD]
  698. DragonFly 4.2.0 2015-06-29 [DFB]
  699. FreeBSD 10.2 2015-08-13 [FBD]
  700. NetBSD 7.0 2015-09-25 [NBD]
  701. OS X 10.11 2015-09-30 [APL]
  702. OpenBSD 5.8 2015-10-18 [OBD]
  703. DragonFly 4.4.1 2015-12-07 [DFB]
  704. OpenBSD 5.9 2016-03-29 [OBD]
  705. FreeBSD 10.3 2016-04-04 [FBD]
  706. NetBSD 7.0.1 2016-05-22 [NBD]
  707. DragonFly 4.6.0 2016-08-02 [DFB]
  708. OpenBSD 6.0 2016-09-01 [OBD]
  709. macOS 10.12 2016-09-20 [APL]
  710. FreeBSD 11.0 2016-10-10 [FBD]
  711. NetBSD 7.1 2017-03-11 [NBD]
  712. DragonFly 4.8.0 2017-03-27 [DFB]
  713.  
  714. Bibliography
  715. ------------------------
  716.  
  717. Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
  718. Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
  719. System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
  720.  
  721. Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
  722. Company, Inc., 1994. ISBN 0-201-54777-5
  723.  
  724. McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
  725. Quarterman. The Design and Implementation of the 4.4BSD Operating
  726. System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
  727.  
  728. McKusick, Marshall Kirk, George Neville-Neil. The Design and
  729. Implementation of the FreeBSD Operating System.
  730. Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
  731.  
  732. McKusick, Marshall Kirk, George Neville-Neil, Robert Watson. The
  733. Design and Implementation of the FreeBSD Operating System, 2nd Edition.
  734. Pearson Education, Inc., 2014. ISBN 0-321-96897-2
  735.  
  736. Doug McIlroy. Research Unix Reader.
  737.  
  738. Michael G. Brown. The Role of BSD in the Development of Unix.
  739. Presented to the Tasmanian Unix Special Interest Group of the
  740. Australian Computer Society, Hobart, August 1993.
  741.  
  742. Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
  743. URL: http://www.byte.com/art/9410/sec8/art3.htm
  744.  
  745. Andreas Klemm, Lars Köller. If you're going to San Francisco ...
  746. Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
  747.  
  748. BSD Release Announcements collection.
  749. URL: http://www.FreeBSD.org/releases/
  750.  
  751. BSD Hypertext Man Pages
  752. URL: http://www.FreeBSD.org/cgi/man.cgi
  753.  
  754. UNIX history graphing project
  755. URL: http://minnie.tuhs.org/Unix_History/index.html
  756.  
  757. UNIX history
  758. URL: http://www.levenez.com/unix/
  759.  
  760. James Howard: The BSD Family Tree
  761. URL: http://ezine.daemonnews.org/200104/bsd_family.html
  762. ("what are the differences between FreeBSD, NetBSD, and OpenBSD?")
  763.  
  764.  
  765. Acknowledgments
  766. ---------------
  767.  
  768. Josh Gilliam for suggestions, bug fixes, and finding very old
  769. original BSD announcements from Usenet or tapes.
  770.  
  771. Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
  772.  
  773. --
  774. Copyright (c) 1997-2012 Wolfram Schneider <wosch@FreeBSD.ORG>
  775. URL: http://svnweb.freebsd.org/base/head/share/misc/bsd-family-tree
  776.  
  777. $FreeBSD$
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