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1The UNIX system family tree: Research and BSD
2---------------------------------------------
3
4First Edition (V1)
5 |
6Second Edition (V2)
7 |
8Third Edition (V3)
9 |
10Fourth Edition (V4)
11 |
12Fifth Edition (V5)
13 |
14Sixth Edition (V6) -----*
15 \ |
16 \ |
17 \ |
18Seventh Edition (V7) |
19 \ |
20 \ 1BSD
21 32V |
22 \ 2BSD---------------*
23 \ / |
24 \ / |
25 \/ |
26 3BSD |
27 | |
916f54c7 28 4.0BSD 2.79BSD
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29 | |
30 4.1BSD --------------> 2.8BSD
31 | |
32 4.1aBSD -----------\ |
33 | \ |
34 4.1bBSD \ |
35 | \ |
36 *------ 4.1cBSD --------------> 2.9BSD
37 / | |
38Eighth Edition | 2.9BSD-Seismo
39 | | |
40 +----<--- 4.2BSD 2.9.1BSD
41 | | |
42 +----<--- 4.3BSD -------------> 2.10BSD
43 | | / |
44Ninth Edition | / 2.10.1BSD
45 | 4.3BSD Tahoe-----+ |
46 | | \ |
47 | | \ |
48 v | 2.11BSD
49Tenth Edition | |
50 | 2.11BSD rev #430
51 4.3BSD NET/1 |
52 | v
53 4.3BSD Reno
54 |
55 *---------- 4.3BSD NET/2 -------------------+-------------*
56 | | | |
57386BSD 0.0 | | BSD/386 ALPHA
58 | | | |
59386BSD 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 | | | |
67FreeBSD 1.0 NetBSD 0.9 | BSD/386 1.1
68 | | .----- 4.4BSD Lite |
69FreeBSD 1.1 | / / | \ |
70 | | / / | \ |
71FreeBSD 1.1.5 .---|--------' / | \ |
72 | / | / | \ |
73FreeBSD 1.1.5.1 / | / | \ |
74 | / NetBSD 1.0 <-' | \ |
75 | / | | \ |
76FreeBSD 2.0 <--' | | BSD/OS 2.0
77 | \ | |
78FreeBSD 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 |
85FreeBSD 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 | v | | | | | |
114 | FreeBSD 2.2.8 | | | | | |
115 | | | | | OpenBSD 2.4 |
116FreeBSD 3.0 <--------* | | v | |
117 | | | NetBSD 1.3.3 | |
118 *---FreeBSD 3.1 | | | |
119 | | | | | BSD/OS 4.0.1
120 | FreeBSD 3.2----* | NetBSD 1.4 OpenBSD 2.5 |
121 | | | | | | | | |
122 | | | | | | | | |
123 | | | | | | | | |
124 | FreeBSD 3.3 | | | | NetBSD 1.4.1 | |
125 | | | | | | | OpenBSD 2.6 |
126 | FreeBSD 3.4 | | | | | | |
127 | | | | | | | | BSD/OS 4.1
128FreeBSD 4.0 | | | | | NetBSD 1.4.2 | |
129 | | | | | | | | |
130 | | | | | | | | |
131 | FreeBSD 3.5 | | | | | OpenBSD 2.7 |
132 | | | | | | | | |
133 | FreeBSD 3.5.1 | | | | | | |
134 | | | | | | | |
135 *---FreeBSD 4.1 | | | | | | |
136 | | | | (?) | | | |
137 | FreeBSD 4.1.1 | | / | | | |
138 | | | | / | | | |
139 | FreeBSD 4.2 Darwin/ | NetBSD 1.4.3 | |
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140 | | Mac OS X | OpenBSD 2.8 BSD/OS 4.2
141 | | | | | |
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142 | | | | | |
143 | | 10.0 NetBSD 1.5 | |
144 | FreeBSD 4.3 | | | | |
145 | | | | | OpenBSD 2.9 |
146 | | | | NetBSD 1.5.1 | |
147 | | | | | | |
148 | FreeBSD 4.4-. | | NetBSD 1.5.2 | |
149 | | | Mac OS X | | | |
150 | | | 10.1 | | OpenBSD 3.0 |
151 | FreeBSD 4.5 | | | | | |
152 | | \ | | | | BSD/OS 4.3
153 | FreeBSD 4.6 \ | | | OpenBSD 3.1 |
e45c8094 154 | | \ | | NetBSD 1.5.3 | |
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155 | FreeBSD 4.6.2 Mac OS X | | |
156 | | 10.2 | | |
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157 | FreeBSD 4.7 | | | |
158 | | | NetBSD 1.6 OpenBSD 3.2 |
159 | FreeBSD 4.8 | | | | |
160 | | | | NetBSD 1.6.1 | |
161 | |--------. | | | OpenBSD 3.3 BSD/OS 5.0
162 | | \ | | | | |
163 | FreeBSD 4.9 | | | | OpenBSD 3.4 BSD/OS 5.1 ISE
164 | | | | | | |
165 | | | | | NetBSD 1.6.2 |
166 | | | | | | |
167 | | | | | | OpenBSD 3.5
168 | | | | | v |
169 | FreeBSD 4.10 | | | |
170 | | | | | |
aaec263a 171 | FreeBSD 4.11 | | | |
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172 | | | | |
173 | `-|------|-----------------|---------------------.
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174 | | | | \
175FreeBSD 5.0 | | | |
176 | | | | |
3e3f5d86 177FreeBSD 5.1 | | | DragonFly 1.0
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178 | \ | | | |
179 | ----- Mac OS X | | |
180 | 10.3 | | |
181FreeBSD 5.2 | | | |
182 | | | | | |
183 | FreeBSD 5.2.1 | | | |
184 | | | | |
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185 *-------FreeBSD 5.3 | | | |
186 | | | | OpenBSD 3.6 |
187 | | | NetBSD 2.0 | |
3e3f5d86 188 | | | | | | | DragonFly 1.2.0
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189 | | Mac OS X | | NetBSD 2.0.2 | |
190 | | 10.4 | | | | |
191 | FreeBSD 5.4 | | | | | |
192 | | | | | | OpenBSD 3.7 |
193 | | | | | NetBSD 2.0.3 | |
194 | | | | | | | |
195 *--FreeBSD | | | | v OpenBSD 3.8 |
196 | 6.0 | | | | | |
197 | | | | | \ | |
198 | | | | | NetBSD 2.1 | |
199 | | | | | | |
200 | | | | NetBSD 3.0 | |
3e3f5d86 201 | | | | | | | | DragonFly 1.4.0
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202 | | | | | | | OpenBSD 3.9 |
203 | FreeBSD | | | | | | |
204 | 6.1 | | | | | | |
205 | | FreeBSD 5.5 | | | | | |
3e3f5d86 206 | | | | | NetBSD 3.0.1 | DragonFly 1.6.0
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207 | | | | | | | |
208 | | | | | | OpenBSD 4.0 |
209 | | | | | NetBSD 3.0.2 | |
210 | | | | NetBSD 3.1 | |
211 | FreeBSD 6.2 | | | |
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212 | | | | | DragonFly 1.8.0
213 | | | | OpenBSD 4.1 |
214 | | | | | DragonFly 1.10.0
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215 | | Mac OS X | | |
216 | | 10.5 | | |
d6762fb9 217 | | | | OpenBSD 4.2 |
951fd62a 218 | | | NetBSD 4.0 | |
4a2380be 219 | FreeBSD 6.3 | | | |
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220 | \ | | | |
221 *--FreeBSD | | | | DragonFly 1.12.0
222 | 7.0 | | | | |
223 | | | | | OpenBSD 4.3 |
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224 | | | | | | DragonFly 2.0.0
225 | | FreeBSD | | OpenBSD 4.4 |
226 | | 6.4 | | | |
227 | | | | | |
228 | FreeBSD 7.1 | | | |
229 | | | | | DragonFly 2.2.0
b97a576c 230 | FreeBSD 7.2 | NetBSD 5.0 OpenBSD 4.5 |
e45c8094 231 | \ | | | | |
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232 | | Mac OS X | | | |
233 | | 10.6 | | | |
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234 | | | | | | DragonFly 2.4.0
235 | | | | | OpenBSD 4.6 |
236 | | | | | | |
237 *--FreeBSD | | | | | |
238 | 8.0 | | | | | |
18e9d236 239 | | FreeBSD | | | | |
e45c8094 240 | | 7.3 | | | | DragonFly 2.6.0
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241 | | | | | | OpenBSD 4.7 |
242 | FreeBSD | | | | | |
243 | 8.1 | | | | | |
244 | | | | | | | DragonFly 2.8.2
245 | | | | | | OpenBSD 4.8 |
246 | | | | | NetBSD 5.1 | |
247 | FreeBSD FreeBSD | | | |
248 | 8.2 7.4 | | | |
249 | v | | | |
4a2380be 250 | | | | |
07596c48 251FreeBSD 9 -current | NetBSD -current OpenBSD -current |
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252 | | | | |
253 v v v v v
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254
255Time
256----------------
257
258Time tolerance +/- 6 months, depending on which book/article you read; if it
259was the announcement in Usenet or if it was available as tape.
260
261[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
262 and John Quarterman. The Design and Implementation of
263 the 4.4BSD Operating System.
264[APL] Apple website [http://www.apple.com/macosx/]
265[BSDI] Berkeley Software Design, Inc.
aaec263a 266[DFB] DragonFlyBSD Project, The.
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267[DOC] README, COPYRIGHT on tape.
268[FBD] FreeBSD Project, The.
269[KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
270 Volume 11, Info 4, April, 1987.
271[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
272 comp.bugs.4bsd.ucb-fixes, June 15, 1988.
273[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
274 Changes in the Kernel in 2.9BSD. Second Berkeley Software
275 Distribution UNIX Version 2.9, July, 1983.
276[NBD] NetBSD Project, The.
277[OBD] OpenBSD Project, The.
278[QCU] Salus, Peter H. A quarter century of UNIX.
279[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
916f54c7 280[TUHS] The Unix Historical Society. http://minnie.tuhs.org/Unix_History/.
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281[USE] Usenet announcement.
282[WRS] Wind River Systems, Inc.
283[dmr] Dennis Ritchie, via E-Mail
284
285Multics 1965
286UNIX Summer 1969
287 DEC PDP-7
288First Edition 1971-11-03 [QCU]
289 DEC PDP-11/20, Assembler
290Second Edition 1972-06-12 [QCU]
291 10 UNIX installations
292Third Edition 1973-02-xx [QCU]
293 Pipes, 16 installations
294Fourth Edition 1973-11-xx [QCU]
295 rewriting in C effected,
296 above 30 installations
297Fifth Edition 1974-06-xx [QCU]
298 above 50 installations
299Sixth Edition 1975-05-xx [QCU]
300 port to DEC Vax
301Seventh Edition 1979-01-xx [QCU]
302 first portable UNIX
303Eighth Edition 1985-02-xx [QCU]
304 VAX 11/750, VAX 11/780 [dmr]
305 descended from 4.1c BSD [dmr]
306 descended from 4.1 BSD [44B]
307 scooping-out and replacement of the character-device
308 and networking part by the streams mechanism
309
310Ninth Edition 1986-09-xx [QCU]
311Tenth Edition 1989-10-xx [QCU]
312
3131BSD late 1977
314 1978-03-09 [QCU]
315 PDP-11, Pascal, ex(1)
316 30 free copies of 1BSD sent out
317 35 tapes sold for 50 USD [QCU]
916f54c7 3182BSD mid 1978 [QCU] 1979-05-10 [TUHS]
984263bc 319 75 2BSD tapes shipped
916f54c7 3202.79BSD 1980-04-xx [TUHS]
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3212.8BSD 1981-07-xx [KSJ]
322
3232.8.1BSD 1982-01-xx [QCU]
324 set of performance improvements
3252.9BSD 1983-07-xx [KSJ]
916f54c7 3262.9.1BSD 1983-11-xx [TUHS]
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3272.9BSD-Seismo 1985-08-xx [SMS]
3282.10BSD 1987-04-xx [KKK]
3292.10.1BSD 1989-01-xx [SMS]
3302.11BSD 1992-02-xx [SMS]
3312.11BSD rev #430 1999-12-13 [SMS]
332
33332V 1978-1[01]-xx [QCU]
916f54c7 3343BSD late 1979 [QCU] March 1980 [TUHS]
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335 virtual memory, page replacement,
336 demand paging
3374.0BSD 1980-10-xx
3384.1BSD 1981-07-08 [DOC]
3394.1aBSD 1982-04-xx
340 alpha release, 100 sites, networking [44B]
3414.1bBSD internal release, fast filesystem [44B]
3424.1cBSD late 1982
343 beta release, IPC [44B]
3444.2BSD 1983-09-xx [QCU]
345 1983-08-03 [DOC]
3464.3BSD 1986-06-xx [QCU]
347 1986-04-05 [KB], [DOC]
3484.3BSD Tahoe 1988-06-15 [QCU], [DOC]
3494.3BSD NET/1 1988-11-xx [QCU]
350 1989-01-01 [DOC]
3514.3BSD Reno 1990-06-29 [QCU], [DOC]
3524.3BSD NET/2 1991-06-28 [QCU], [DOC]
353
354BSD/386 ALPHA 1991-12-xx [BSDI]
355 first code released to people outside BSDI
356386BSD 0.0 1992-02-xx [DOC]
357BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers
358BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version
359386BSD 0.1 1992-07-28 [DOC]
3604.4BSD Alpha 1992-07-07
361BSD/386 0.9.3 1992-10-xx [BSDI]
362 first external gamma; G customers
363BSD/386 0.9.4 1992-12-xx [BSDI]
364 would have been 1.0 except for request
365 for preliminary injunction
366BSD/386 1.0 1993-03-xx [BSDI]
367 injunction denied; first official release
368NetBSD 0.8 1993-04-20 [NBD]
3694.4BSD 1993-06-01 [USE]
370NetBSD 0.9 1993-08-23 [NBD]
371FreeBSD 1.0 1993-11-01 [FBD]
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372FreeBSD 1.0.2 1993-11-14 [FBD]
373 supersedes 1.0 13 days after release.
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374BSD/386 1.1 1994-02-xx [BSDI]
3754.4BSD Lite 1994-03-01 [USE]
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376FreeBSD 1.1 1994-05-07 [FBD]
377FreeBSD 1.1.5 1994-06-30 [FBD]
378FreeBSD 1.1.5.1 1994-07-05 [FBD]
379 supersedes 1.1.5 5 days after release.
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380NetBSD 1.0 1994-10-26 [NBD]
381386BSD 1.0 1994-11-12 [USE]
aaec263a 382FreeBSD 2.0 1994-11-23 [FBD]
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383BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based
384FreeBSD 2.0.5 1995-06-10 [FBD]
385BSD/OS 2.0.1 1995-06-xx [BSDI]
3864.4BSD Lite Release 2 1995-06-xx [44B]
387 the true final distribution from the CSRG
388FreeBSD 2.1.0 1995-11-19 [FBD]
389NetBSD 1.1 1995-11-26 [NBD]
390BSD/OS 2.1 1996-01-xx [BSDI]
391FreeBSD 2.1.5 1996-07-14 [FBD]
392NetBSD 1.2 1996-10-04 [NBD]
393OpenBSD 2.0 1996-10-18 [OBD]
394FreeBSD 2.1.6 1996-11-16 [FBD]
395FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release)
396Rhapsody 1997-xx-xx
397FreeBSD 2.1.7 1997-02-20 [FBD]
398BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based
399FreeBSD 2.2.0 1997-03-16 [FBD]
400FreeBSD 2.2.1 1997-03-25 [FBD]
401FreeBSD 2.2.2 1997-05-16 [FBD]
402NetBSD 1.2.1 1997-05-20 [NBD] (patch release)
403OpenBSD 2.1 1997-06-01 [OBD]
404FreeBSD 2.2.5 1997-10-22 [FBD]
405OpenBSD 2.2 1997-12-01 [OBD]
406NetBSD 1.3 1998-01-04 [NBD]
407FreeBSD 2.2.6 1998-03-25 [FBD]
408NetBSD 1.3.1 1998-03-09 [NBD] (patch release)
409BSD/OS 3.1 1998-03-xx [BSDI]
410OpenBSD 2.3 1998-05-19 [OBD]
411NetBSD 1.3.2 1998-05-29 [NBD] (patch release)
412FreeBSD 2.2.7 1998-07-22 [FBD]
413BSD/OS 4.0 1998-08-xx [BSDI]
414 2-lock MP support, ELF executables
415FreeBSD 3.0 1998-10-16 [FBD]
416 FreeBSD-3.0 is a snapshot from -current,
417 while 3.1 and 3.2 are from 3.x-stable which
418 was branched quite some time after 3.0-release
419FreeBSD 2.2.8 1998-11-29 [FBD]
420OpenBSD 2.4 1998-12-01 [OBD]
421NetBSD 1.3.3 1998-12-23 [NBD] (patch release)
422FreeBSD 3.1 1999-02-15 [FBD]
423BSD/OS 4.0.1 1999-03-xx [BSDI]
424NetBSD 1.4 1999-05-12 [NBD]
425FreeBSD 3.2 1999-05-17 [FBD]
426OpenBSD 2.5 1999-05-19 [OBD]
427NetBSD 1.4.1 1999-08-26 [NBD] (patch release)
428FreeBSD 3.3 1999-09-17 [FBD]
429OpenBSD 2.6 1999-12-01 [OBD]
430FreeBSD 3.4 1999-12-20 [FBD]
431BSD/OS 4.1 1999-12-xx [BSDI]
432FreeBSD 4.0 2000-03-13 [FBD]
433NetBSD 1.4.2 2000-03-19 [NBD] (patch release)
434OpenBSD 2.7 2000-06-15 [OBD]
435FreeBSD 3.5 2000-06-24 [FBD]
436FreeBSD 4.1 2000-07-27 [FBD]
437FreeBSD 3.5.1 2000-07-28 [FBD]
438FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release)
439FreeBSD 4.2 2000-11-21 [FBD]
440NetBSD 1.4.3 2000-11-25 [NBD] (patch release)
441BSD/OS 4.2 2000-11-29 [BSDI]
442OpenBSD 2.8 2000-12-01 [OBD]
443NetBSD 1.5 2000-12-06 [NBD]
444Mac OS X 10.0 2001-03-24 [APL]
445FreeBSD 4.3 2001-04-20 [FBD]
446OpenBSD 2.9 2001-06-01 [OBD]
447NetBSD 1.5.1 2001-07-11 [NBD] (patch release)
448NetBSD 1.5.2 2001-09-13 [NBD] (patch release)
449FreeBSD 4.4 2001-09-18 [FBD]
450Mac OS X 10.1 2001-09-29 [APL]
451OpenBSD 3.0 2001-12-01 [OBD]
452FreeBSD 4.5 2002-01-29 [FBD]
453BSD/OS 4.3 2002-03-14 [WRS]
454OpenBSD 3.1 2002-05-19 [OBD]
455FreeBSD 4.6 2002-06-15 [FBD]
456NetBSD 1.5.3 2002-07-22 [NBD] (patch release)
457FreeBSD 4.6.2 2002-08-15 [FBD] (patch release)
458Mac OS X 10.2 2002-08-23 [APL]
459NetBSD 1.6 2002-09-14 [NBD]
460FreeBSD 4.7 2002-10-08 [FBD]
461OpenBSD 3.2 2002-11-01 [OBD]
462FreeBSD 5.0 2003-01-17 [FBD]
463 FreeBSD 5.0 is a separate branch off of
464 -current, similar to 3.0.
465FreeBSD 4.8 2003-04-03 [FBD]
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466NetBSD 1.6.1 2003-04-21 [NBD] (patch release)
467OpenBSD 3.3 2003-05-01 [OBD]
468BSD/OS 5.0 2003-05-?? [WRS]
469FreeBSD 5.1 2003-06-09 [FBD]
470Mac OS X 10.3 2003-10-24 [APL]
471FreeBSD 4.9 2003-10-28 [FBD]
472BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version)
473OpenBSD 3.4 2003-11-01 [OBD]
474FreeBSD 5.2 2004-01-12 [FBD]
475FreeBSD 5.2.1 2004-02-22 [FBD] (patch release)
476NetBSD 1.6.2 2004-03-01 [NBD] (patch release)
477OpenBSD 3.5 2004-04-01 [OBD]
478FreeBSD 4.10 2004-05-27 [FBD]
b58193df 479DragonFly 1.0 2004-07-12 [DFB]
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480OpenBSD 3.6 2004-10-29 [OBD]
481FreeBSD 5.3 2004-11-06 [FBD]
482NetBSD 2.0 2004-12-09 [NBD]
483FreeBSD 4.11 2005-01-25 [FBD]
484DragonFly 1.2.0 2005-04-08 [DFB]
485NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release)
486Mac OS X 10.4 2005-04-29 [APL]
487FreeBSD 5.4 2005-05-09 [FBD]
488OpenBSD 3.7 2005-05-19 [OBD]
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489NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release)
490OpenBSD 3.8 2005-11-01 [OBD]
491FreeBSD 6.0 2005-11-01 [FBD]
492NetBSD 2.1 2005-11-02 [NBD]
493NetBSD 3.0 2005-12-23 [NBD]
494DragonFly 1.4.0 2006-01-08 [DFB]
cc87307c 495OpenBSD 3.9 2006-05-01 [OBD]
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496FreeBSD 6.1 2006-05-08 [FBD]
497FreeBSD 5.5 2006-05-25 [FBD]
498NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release)
499DragonFly 1.6.0 2006-07-24 [DFB]
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500OpenBSD 4.0 2006-11-01 [OBD]
501NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release)
502NetBSD 3.1 2006-11-04 [NBD]
503FreeBSD 6.2 2007-01-15 [FBD]
ead66c62 504DragonFly 1.8.0 2007-01-30 [DFB]
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505OpenBSD 4.1 2007-05-01 [OBD]
506DragonFly 1.10.0 2007-08-06 [DFB]
00ef4ae2 507Mac OS X 10.5 2007-10-26 [APL]
d6762fb9 508OpenBSD 4.2 2007-11-01 [OBD]
951fd62a 509NetBSD 4.0 2007-12-19 [NBD]
4a2380be 510FreeBSD 6.3 2008-01-18 [FBD]
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511DragonFly 1.12.0 2008-02-26 [DFB]
512FreeBSD 7.0 2008-02-27 [FBD]
5083139e 513OpenBSD 4.3 2008-05-01 [OBD]
5f8ebbcb 514DragonFly 2.0.0 2008-07-21 [DFB]
261c8119
MS
515OpenBSD 4.4 2008-11-01 [OBD]
516FreeBSD 6.4 2008-11-28 [FBD]
0f564fbc
MS
517FreeBSD 7.1 2009-01-04 [FBD]
518DragonFly 2.2.0 2009-02-17 [DFB]
b97a576c
SW
519NetBSD 5.0 2009-04-29 [NBD]
520OpenBSD 4.5 2009-05-01 [OBD]
521FreeBSD 7.2 2009-05-04 [FBD]
18e9d236 522Mac OS X 10.6 2009-06-08 [APL]
0ee5575c 523DragonFly 2.4.0 2009-09-16 [DFB]
07596c48
SW
524OpenBSD 4.6 2009-10-18 [OBD]
525FreeBSD 8.0 2009-11-26 [FBD]
bec098e2 526FreeBSD 7.3 2010-03-23 [FBD]
587ed6e3 527DragonFly 2.6.0 2010-03-28 [DFB]
c921db95 528OpenBSD 4.7 2010-05-19 [OBD]
9b10e6be 529FreeBSD 8.1 2010-07-24 [FBD]
e45c8094
SW
530DragonFly 2.8.2 2010-10-30 [DFB]
531OpenBSD 4.8 2010-11-01 [OBD]
532NetBSD 5.1 2010-11-19 [NBD]
18e9d236
SW
533FreeBSD 7.4 2011-02-24 [FBD]
534FreeBSD 8.2 2011-02-24 [FBD]
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535
536Bibliography
537------------------------
538
539Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
540Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
541System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
542
543Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
544Company, Inc., 1994. ISBN 0-201-54777-5
545
546McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
547Quarterman. The Design and Implementation of the 4.4BSD Operating
548System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
549
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550McKusick, Marshall Kirk, George Neville-Neil. The Design and
551Implementation of the FreeBSD Operating System.
552Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2
553
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554Doug McIlroy. Research Unix Reader.
555
556Michael G. Brown. The Role of BSD in the Development of Unix.
557Presented to the Tasmanian Unix Special Interest Group of the
558Australian Computer Society, Hobart, August 1993.
559
560Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
aaec263a 561URL: http://www.byte.com/art/9410/sec8/art3.htm
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562
563