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 | | 28 4.0BSD 2.7.9BSD 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 | | 140 | | Mac OS X | OpenBSD 2.8 BSD/OS 4.2 141 | | | | | | 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 | 154 | | \ | | NetBSD 1.5.3 | | 155 | FreeBSD 4.6.2 Mac OS X | | | 156 | | 10.2 | | | 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 | | | | | | 171 | FreeBSD 4.11 | | | | 172 | | | | | 173 | `-|------|-----------------|---------------------. 174 | | | | \ 175FreeBSD 5.0 | | | | 176 | | | | | 177FreeBSD 5.1 | | | DragonFly 1.0 178 | \ | | | | 179 | ----- Mac OS X | | | 180 | 10.3 | | | 181FreeBSD 5.2 | | | | 182 | | | | | | 183 | FreeBSD 5.2.1 | | | | 184 | | | | | 185 *-------FreeBSD 5.3 | | | | 186 | | | | OpenBSD 3.6 | 187 | | | NetBSD 2.0 | | 188 | | | | | | | DragonFly 1.2.0 189 | | 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 | | 201 | | | | | | | | DragonFly 1.4.0 202 | | | | | | | OpenBSD 3.9 | 203 | FreeBSD | | | | | | | 204 | 6.1 | | | | | | | 205 | | FreeBSD 5.5 | | | | | | 206 | | | | | NetBSD 3.0.1 | DragonFly 1.6.0 207 | | | | | | | | 208 | | | | | | OpenBSD 4.0 | 209 | | | | | NetBSD 3.0.2 | | 210 | | | | NetBSD 3.1 | | 211 | FreeBSD 6.2 | | | | 212 | | | | | DragonFly 1.8.0 213 | | | | OpenBSD 4.1 | 214 | | | | | DragonFly 1.10.0 215 | | Mac OS X | | | 216 | | 10.5 | | | 217 | | | | OpenBSD 4.2 | 218 | | | NetBSD 4.0 | | 219 | FreeBSD 6.3 | | | | 220 | \ | | | | 221 *--FreeBSD | | | | DragonFly 1.12.0 222 | 7.0 | | | | | 223 | | | | | OpenBSD 4.3 | 224 | | | | | | DragonFly 2.0.0 225 | | FreeBSD | | OpenBSD 4.4 | 226 | | 6.4 | | | | 227 | | | | | | 228 | FreeBSD 7.1 | | | | 229 | | | | | DragonFly 2.2.0 230 | FreeBSD 7.2 | NetBSD 5.0 OpenBSD 4.5 | 231 | | | | | | 232 | V | | | | 233 | | | | | 234FreeBSD 8 -current | NetBSD -current OpenBSD -current | 235 | | | | | 236 v v v v v 237 238Time 239---------------- 240 241Time tolerance +/- 6 months, depending on which book/article you read; if it 242was the announcement in Usenet or if it was available as tape. 243 244[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, 245 and John Quarterman. The Design and Implementation of 246 the 4.4BSD Operating System. 247[APL] Apple website [http://www.apple.com/macosx/] 248[BSDI] Berkeley Software Design, Inc. 249[DFB] DragonFlyBSD Project, The. 250[DOC] README, COPYRIGHT on tape. 251[FBD] FreeBSD Project, The. 252[KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources, 253 Volume 11, Info 4, April, 1987. 254[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement. 255 comp.bugs.4bsd.ucb-fixes, June 15, 1988. 256[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz. 257 Changes in the Kernel in 2.9BSD. Second Berkeley Software 258 Distribution UNIX Version 2.9, July, 1983. 259[NBD] NetBSD Project, The. 260[OBD] OpenBSD Project, The. 261[QCU] Salus, Peter H. A quarter century of UNIX. 262[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11. 263[USE] Usenet announcement. 264[WRS] Wind River Systems, Inc. 265[dmr] Dennis Ritchie, via E-Mail 266 267Multics 1965 268UNIX Summer 1969 269 DEC PDP-7 270First Edition 1971-11-03 [QCU] 271 DEC PDP-11/20, Assembler 272Second Edition 1972-06-12 [QCU] 273 10 UNIX installations 274Third Edition 1973-02-xx [QCU] 275 Pipes, 16 installations 276Fourth Edition 1973-11-xx [QCU] 277 rewriting in C effected, 278 above 30 installations 279Fifth Edition 1974-06-xx [QCU] 280 above 50 installations 281Sixth Edition 1975-05-xx [QCU] 282 port to DEC Vax 283Seventh Edition 1979-01-xx [QCU] 284 first portable UNIX 285Eighth Edition 1985-02-xx [QCU] 286 VAX 11/750, VAX 11/780 [dmr] 287 descended from 4.1c BSD [dmr] 288 descended from 4.1 BSD [44B] 289 scooping-out and replacement of the character-device 290 and networking part by the streams mechanism 291 292Ninth Edition 1986-09-xx [QCU] 293Tenth Edition 1989-10-xx [QCU] 294 2951BSD late 1977 296 1978-03-09 [QCU] 297 PDP-11, Pascal, ex(1) 298 30 free copies of 1BSD sent out 299 35 tapes sold for 50 USD [QCU] 3002BSD mid 1978 [QCU] 301 75 2BSD tapes shipped 3022.7.9BSD ?? [SMS] 3032.8BSD 1981-07-xx [KSJ] 304 3052.8.1BSD 1982-01-xx [QCU] 306 set of performance improvements 3072.9BSD 1983-07-xx [KSJ] 3082.9.1BSD 1983-11-xx 3092.9BSD-Seismo 1985-08-xx [SMS] 3102.10BSD 1987-04-xx [KKK] 3112.10.1BSD 1989-01-xx [SMS] 3122.11BSD 1992-02-xx [SMS] 3132.11BSD rev #430 1999-12-13 [SMS] 314 31532V 1978-1[01]-xx [QCU] 3163BSD late 1979 [QCU] 317 virtual memory, page replacement, 318 demand paging 3194.0BSD 1980-10-xx 3204.1BSD 1981-07-08 [DOC] 3214.1aBSD 1982-04-xx 322 alpha release, 100 sites, networking [44B] 3234.1bBSD internal release, fast filesystem [44B] 3244.1cBSD late 1982 325 beta release, IPC [44B] 3264.2BSD 1983-09-xx [QCU] 327 1983-08-03 [DOC] 3284.3BSD 1986-06-xx [QCU] 329 1986-04-05 [KB], [DOC] 3304.3BSD Tahoe 1988-06-15 [QCU], [DOC] 3314.3BSD NET/1 1988-11-xx [QCU] 332 1989-01-01 [DOC] 3334.3BSD Reno 1990-06-29 [QCU], [DOC] 3344.3BSD NET/2 1991-06-28 [QCU], [DOC] 335 336BSD/386 ALPHA 1991-12-xx [BSDI] 337 first code released to people outside BSDI 338386BSD 0.0 1992-02-xx [DOC] 339BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers 340BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version 341386BSD 0.1 1992-07-28 [DOC] 3424.4BSD Alpha 1992-07-07 343BSD/386 0.9.3 1992-10-xx [BSDI] 344 first external gamma; G customers 345BSD/386 0.9.4 1992-12-xx [BSDI] 346 would have been 1.0 except for request 347 for preliminary injunction 348BSD/386 1.0 1993-03-xx [BSDI] 349 injunction denied; first official release 350NetBSD 0.8 1993-04-20 [NBD] 3514.4BSD 1993-06-01 [USE] 352NetBSD 0.9 1993-08-23 [NBD] 353FreeBSD 1.0 1993-11-01 [FBD] 354FreeBSD 1.0.2 1993-11-14 [FBD] 355 supersedes 1.0 13 days after release. 356BSD/386 1.1 1994-02-xx [BSDI] 3574.4BSD Lite 1994-03-01 [USE] 358FreeBSD 1.1 1994-05-07 [FBD] 359FreeBSD 1.1.5 1994-06-30 [FBD] 360FreeBSD 1.1.5.1 1994-07-05 [FBD] 361 supersedes 1.1.5 5 days after release. 362NetBSD 1.0 1994-10-26 [NBD] 363386BSD 1.0 1994-11-12 [USE] 364FreeBSD 2.0 1994-11-23 [FBD] 365BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based 366FreeBSD 2.0.5 1995-06-10 [FBD] 367BSD/OS 2.0.1 1995-06-xx [BSDI] 3684.4BSD Lite Release 2 1995-06-xx [44B] 369 the true final distribution from the CSRG 370FreeBSD 2.1.0 1995-11-19 [FBD] 371NetBSD 1.1 1995-11-26 [NBD] 372BSD/OS 2.1 1996-01-xx [BSDI] 373FreeBSD 2.1.5 1996-07-14 [FBD] 374NetBSD 1.2 1996-10-04 [NBD] 375OpenBSD 2.0 1996-10-18 [OBD] 376FreeBSD 2.1.6 1996-11-16 [FBD] 377FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release) 378Rhapsody 1997-xx-xx 379FreeBSD 2.1.7 1997-02-20 [FBD] 380BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based 381FreeBSD 2.2.0 1997-03-16 [FBD] 382FreeBSD 2.2.1 1997-03-25 [FBD] 383FreeBSD 2.2.2 1997-05-16 [FBD] 384NetBSD 1.2.1 1997-05-20 [NBD] (patch release) 385OpenBSD 2.1 1997-06-01 [OBD] 386FreeBSD 2.2.5 1997-10-22 [FBD] 387OpenBSD 2.2 1997-12-01 [OBD] 388NetBSD 1.3 1998-01-04 [NBD] 389FreeBSD 2.2.6 1998-03-25 [FBD] 390NetBSD 1.3.1 1998-03-09 [NBD] (patch release) 391BSD/OS 3.1 1998-03-xx [BSDI] 392OpenBSD 2.3 1998-05-19 [OBD] 393NetBSD 1.3.2 1998-05-29 [NBD] (patch release) 394FreeBSD 2.2.7 1998-07-22 [FBD] 395BSD/OS 4.0 1998-08-xx [BSDI] 396 2-lock MP support, ELF executables 397FreeBSD 3.0 1998-10-16 [FBD] 398 FreeBSD-3.0 is a snapshot from -current, 399 while 3.1 and 3.2 are from 3.x-stable which 400 was branched quite some time after 3.0-release 401FreeBSD 2.2.8 1998-11-29 [FBD] 402OpenBSD 2.4 1998-12-01 [OBD] 403NetBSD 1.3.3 1998-12-23 [NBD] (patch release) 404FreeBSD 3.1 1999-02-15 [FBD] 405BSD/OS 4.0.1 1999-03-xx [BSDI] 406NetBSD 1.4 1999-05-12 [NBD] 407FreeBSD 3.2 1999-05-17 [FBD] 408OpenBSD 2.5 1999-05-19 [OBD] 409NetBSD 1.4.1 1999-08-26 [NBD] (patch release) 410FreeBSD 3.3 1999-09-17 [FBD] 411OpenBSD 2.6 1999-12-01 [OBD] 412FreeBSD 3.4 1999-12-20 [FBD] 413BSD/OS 4.1 1999-12-xx [BSDI] 414FreeBSD 4.0 2000-03-13 [FBD] 415NetBSD 1.4.2 2000-03-19 [NBD] (patch release) 416OpenBSD 2.7 2000-06-15 [OBD] 417FreeBSD 3.5 2000-06-24 [FBD] 418FreeBSD 4.1 2000-07-27 [FBD] 419FreeBSD 3.5.1 2000-07-28 [FBD] 420FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release) 421FreeBSD 4.2 2000-11-21 [FBD] 422NetBSD 1.4.3 2000-11-25 [NBD] (patch release) 423BSD/OS 4.2 2000-11-29 [BSDI] 424OpenBSD 2.8 2000-12-01 [OBD] 425NetBSD 1.5 2000-12-06 [NBD] 426Mac OS X 10.0 2001-03-24 [APL] 427FreeBSD 4.3 2001-04-20 [FBD] 428OpenBSD 2.9 2001-06-01 [OBD] 429NetBSD 1.5.1 2001-07-11 [NBD] (patch release) 430NetBSD 1.5.2 2001-09-13 [NBD] (patch release) 431FreeBSD 4.4 2001-09-18 [FBD] 432Mac OS X 10.1 2001-09-29 [APL] 433OpenBSD 3.0 2001-12-01 [OBD] 434FreeBSD 4.5 2002-01-29 [FBD] 435BSD/OS 4.3 2002-03-14 [WRS] 436OpenBSD 3.1 2002-05-19 [OBD] 437FreeBSD 4.6 2002-06-15 [FBD] 438NetBSD 1.5.3 2002-07-22 [NBD] (patch release) 439FreeBSD 4.6.2 2002-08-15 [FBD] (patch release) 440Mac OS X 10.2 2002-08-23 [APL] 441NetBSD 1.6 2002-09-14 [NBD] 442FreeBSD 4.7 2002-10-08 [FBD] 443OpenBSD 3.2 2002-11-01 [OBD] 444FreeBSD 5.0 2003-01-17 [FBD] 445 FreeBSD 5.0 is a separate branch off of 446 -current, similar to 3.0. 447FreeBSD 4.8 2003-04-03 [FBD] 448NetBSD 1.6.1 2003-04-21 [NBD] (patch release) 449OpenBSD 3.3 2003-05-01 [OBD] 450BSD/OS 5.0 2003-05-?? [WRS] 451FreeBSD 5.1 2003-06-09 [FBD] 452Mac OS X 10.3 2003-10-24 [APL] 453FreeBSD 4.9 2003-10-28 [FBD] 454BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version) 455OpenBSD 3.4 2003-11-01 [OBD] 456FreeBSD 5.2 2004-01-12 [FBD] 457FreeBSD 5.2.1 2004-02-22 [FBD] (patch release) 458NetBSD 1.6.2 2004-03-01 [NBD] (patch release) 459OpenBSD 3.5 2004-04-01 [OBD] 460FreeBSD 4.10 2004-05-27 [FBD] 461DragonFly 1.0 2004-07-12 [DFB] 462OpenBSD 3.6 2004-10-29 [OBD] 463FreeBSD 5.3 2004-11-06 [FBD] 464NetBSD 2.0 2004-12-09 [NBD] 465FreeBSD 4.11 2005-01-25 [FBD] 466DragonFly 1.2.0 2005-04-08 [DFB] 467NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release) 468Mac OS X 10.4 2005-04-29 [APL] 469FreeBSD 5.4 2005-05-09 [FBD] 470OpenBSD 3.7 2005-05-19 [OBD] 471NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release) 472OpenBSD 3.8 2005-11-01 [OBD] 473FreeBSD 6.0 2005-11-01 [FBD] 474NetBSD 2.1 2005-11-02 [NBD] 475NetBSD 3.0 2005-12-23 [NBD] 476DragonFly 1.4.0 2006-01-08 [DFB] 477OpenBSD 3.9 2006-05-01 [OBD] 478FreeBSD 6.1 2006-05-08 [FBD] 479FreeBSD 5.5 2006-05-25 [FBD] 480NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release) 481DragonFly 1.6.0 2006-07-24 [DFB] 482OpenBSD 4.0 2006-11-01 [OBD] 483NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release) 484NetBSD 3.1 2006-11-04 [NBD] 485FreeBSD 6.2 2007-01-15 [FBD] 486DragonFly 1.8.0 2007-01-30 [DFB] 487OpenBSD 4.1 2007-05-01 [OBD] 488DragonFly 1.10.0 2007-08-06 [DFB] 489Mac OS X 10.5 2007-10-26 [APL] 490OpenBSD 4.2 2007-11-01 [OBD] 491NetBSD 4.0 2007-12-19 [NBD] 492FreeBSD 6.3 2008-01-18 [FBD] 493DragonFly 1.12.0 2008-02-26 [DFB] 494FreeBSD 7.0 2008-02-27 [FBD] 495OpenBSD 4.3 2008-05-01 [OBD] 496DragonFly 2.0.0 2008-07-21 [DFB] 497OpenBSD 4.4 2008-11-01 [OBD] 498FreeBSD 6.4 2008-11-28 [FBD] 499FreeBSD 7.1 2009-01-04 [FBD] 500DragonFly 2.2.0 2009-02-17 [DFB] 501NetBSD 5.0 2009-04-29 [NBD] 502OpenBSD 4.5 2009-05-01 [OBD] 503FreeBSD 7.2 2009-05-04 [FBD] 504 505Bibliography 506------------------------ 507 508Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John 509Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating 510System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1 511 512Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing 513Company, Inc., 1994. ISBN 0-201-54777-5 514 515McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John 516Quarterman. The Design and Implementation of the 4.4BSD Operating 517System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4 518 519McKusick, Marshall Kirk, George Neville-Neil. The Design and 520Implementation of the FreeBSD Operating System. 521Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2 522 523Doug McIlroy. Research Unix Reader. 524 525Michael G. Brown. The Role of BSD in the Development of Unix. 526Presented to the Tasmanian Unix Special Interest Group of the 527Australian Computer Society, Hobart, August 1993. 528 529Peter H. Salus. Unix at 25. Byte Magazine, October 1994. 530URL: http://www.byte.com/art/9410/sec8/art3.htm 531 532Andreas Klemm, Lars K�ller. If you're going to San Francisco ... 533Die freien BSD-Varianten von Unix. c't April 1997, page 368ff. 534 535BSD Release Announcements collection. 536URL: http://www.de.FreeBSD.org/de/ftp/releases/ 537 538BSD Hypertext Man Pages 539URL: http://www.FreeBSD.org/cgi/man.cgi 540 541UNIX history graphing project 542URL: http://minnie.tuhs.org/Unix_History/index.html 543 544UNIX history 545URL: http://www.levenez.com/unix/ 546 547James Howard: The BSD Family Tree 548URL: http://ezine.daemonnews.org/200104/bsd_family.html 549("what are the differences between FreeBSD, NetBSD, and OpenBSD?") 550 551 552Acknowledgments 553--------------- 554 555Josh Gilliam for suggestions, bug fixes, and finding very old 556original BSD announcements from Usenet or tapes. 557 558Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages. 559 560-- 561Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG> 562URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree 563 564$FreeBSD: src/share/misc/bsd-family-tree,v 1.129 2009/05/05 20:54:26 maxim Exp $ 565