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 | v `-|------|-----------------|---------------------. 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 | V | | | | 215FreeBSD 7 -current | NetBSD -current OpenBSD -current | 216 | | | | | 217 v v v v v 218 219Time 220---------------- 221 222Time tolerance +/- 6 months, depending on which book/article you read; if it 223was the announcement in Usenet or if it was available as tape. 224 225[44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, 226 and John Quarterman. The Design and Implementation of 227 the 4.4BSD Operating System. 228[APL] Apple website [http://www.apple.com/macosx/] 229[BSDI] Berkeley Software Design, Inc. 230[DFB] DragonFlyBSD Project, The. 231[DOC] README, COPYRIGHT on tape. 232[FBD] FreeBSD Project, The. 233[KB] Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources, 234 Volume 11, Info 4, April, 1987. 235[KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement. 236 comp.bugs.4bsd.ucb-fixes, June 15, 1988. 237[KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz. 238 Changes in the Kernel in 2.9BSD. Second Berkeley Software 239 Distribution UNIX Version 2.9, July, 1983. 240[NBD] NetBSD Project, The. 241[OBD] OpenBSD Project, The. 242[QCU] Salus, Peter H. A quarter century of UNIX. 243[SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11. 244[USE] Usenet announcement. 245[WRS] Wind River Systems, Inc. 246[dmr] Dennis Ritchie, via E-Mail 247 248Multics 1965 249UNIX Summer 1969 250 DEC PDP-7 251First Edition 1971-11-03 [QCU] 252 DEC PDP-11/20, Assembler 253Second Edition 1972-06-12 [QCU] 254 10 UNIX installations 255Third Edition 1973-02-xx [QCU] 256 Pipes, 16 installations 257Fourth Edition 1973-11-xx [QCU] 258 rewriting in C effected, 259 above 30 installations 260Fifth Edition 1974-06-xx [QCU] 261 above 50 installations 262Sixth Edition 1975-05-xx [QCU] 263 port to DEC Vax 264Seventh Edition 1979-01-xx [QCU] 265 first portable UNIX 266Eighth Edition 1985-02-xx [QCU] 267 VAX 11/750, VAX 11/780 [dmr] 268 descended from 4.1c BSD [dmr] 269 descended from 4.1 BSD [44B] 270 scooping-out and replacement of the character-device 271 and networking part by the streams mechanism 272 273Ninth Edition 1986-09-xx [QCU] 274Tenth Edition 1989-10-xx [QCU] 275 2761BSD late 1977 277 1978-03-09 [QCU] 278 PDP-11, Pascal, ex(1) 279 30 free copies of 1BSD sent out 280 35 tapes sold for 50 USD [QCU] 2812BSD mid 1978 [QCU] 282 75 2BSD tapes shipped 2832.7.9BSD ?? [SMS] 2842.8BSD 1981-07-xx [KSJ] 285 2862.8.1BSD 1982-01-xx [QCU] 287 set of performance improvements 2882.9BSD 1983-07-xx [KSJ] 2892.9.1BSD 1983-11-xx 2902.9BSD-Seismo 1985-08-xx [SMS] 2912.10BSD 1987-04-xx [KKK] 2922.10.1BSD 1989-01-xx [SMS] 2932.11BSD 1992-02-xx [SMS] 2942.11BSD rev #430 1999-12-13 [SMS] 295 29632V 1978-1[01]-xx [QCU] 2973BSD late 1979 [QCU] 298 virtual memory, page replacement, 299 demand paging 3004.0BSD 1980-10-xx 3014.1BSD 1981-07-08 [DOC] 3024.1aBSD 1982-04-xx 303 alpha release, 100 sites, networking [44B] 3044.1bBSD internal release, fast filesystem [44B] 3054.1cBSD late 1982 306 beta release, IPC [44B] 3074.2BSD 1983-09-xx [QCU] 308 1983-08-03 [DOC] 3094.3BSD 1986-06-xx [QCU] 310 1986-04-05 [KB], [DOC] 3114.3BSD Tahoe 1988-06-15 [QCU], [DOC] 3124.3BSD NET/1 1988-11-xx [QCU] 313 1989-01-01 [DOC] 3144.3BSD Reno 1990-06-29 [QCU], [DOC] 3154.3BSD NET/2 1991-06-28 [QCU], [DOC] 316 317BSD/386 ALPHA 1991-12-xx [BSDI] 318 first code released to people outside BSDI 319386BSD 0.0 1992-02-xx [DOC] 320BSD/386 0.3.1 1992-04-xx [BSDI] first ext. beta; B customers 321BSD/386 0.3.3 1992-06-xx [BSDI] first CDROM version 322386BSD 0.1 1992-07-28 [DOC] 3234.4BSD Alpha 1992-07-07 324BSD/386 0.9.3 1992-10-xx [BSDI] 325 first external gamma; G customers 326BSD/386 0.9.4 1992-12-xx [BSDI] 327 would have been 1.0 except for request 328 for preliminary injunction 329BSD/386 1.0 1993-03-xx [BSDI] 330 injunction denied; first official release 331NetBSD 0.8 1993-04-20 [NBD] 3324.4BSD 1993-06-01 [USE] 333NetBSD 0.9 1993-08-23 [NBD] 334FreeBSD 1.0 1993-11-01 [FBD] 335FreeBSD 1.0.2 1993-11-14 [FBD] 336 supersedes 1.0 13 days after release. 337BSD/386 1.1 1994-02-xx [BSDI] 3384.4BSD Lite 1994-03-01 [USE] 339FreeBSD 1.1 1994-05-07 [FBD] 340FreeBSD 1.1.5 1994-06-30 [FBD] 341FreeBSD 1.1.5.1 1994-07-05 [FBD] 342 supersedes 1.1.5 5 days after release. 343NetBSD 1.0 1994-10-26 [NBD] 344386BSD 1.0 1994-11-12 [USE] 345FreeBSD 2.0 1994-11-23 [FBD] 346BSD/OS 2.0 1995-01-xx [BSDI] 4.4 lite based 347FreeBSD 2.0.5 1995-06-10 [FBD] 348BSD/OS 2.0.1 1995-06-xx [BSDI] 3494.4BSD Lite Release 2 1995-06-xx [44B] 350 the true final distribution from the CSRG 351FreeBSD 2.1.0 1995-11-19 [FBD] 352NetBSD 1.1 1995-11-26 [NBD] 353BSD/OS 2.1 1996-01-xx [BSDI] 354FreeBSD 2.1.5 1996-07-14 [FBD] 355NetBSD 1.2 1996-10-04 [NBD] 356OpenBSD 2.0 1996-10-18 [OBD] 357FreeBSD 2.1.6 1996-11-16 [FBD] 358FreeBSD 2.1.6.1 1996-11-25 [FBD] (sendmail security release) 359Rhapsody 1997-xx-xx 360FreeBSD 2.1.7 1997-02-20 [FBD] 361BSD/OS 3.0 1997-02-xx [BSDI] 4.4 lite2 based 362FreeBSD 2.2.0 1997-03-16 [FBD] 363FreeBSD 2.2.1 1997-03-25 [FBD] 364FreeBSD 2.2.2 1997-05-16 [FBD] 365NetBSD 1.2.1 1997-05-20 [NBD] (patch release) 366OpenBSD 2.1 1997-06-01 [OBD] 367FreeBSD 2.2.5 1997-10-22 [FBD] 368OpenBSD 2.2 1997-12-01 [OBD] 369NetBSD 1.3 1998-01-04 [NBD] 370FreeBSD 2.2.6 1998-03-25 [FBD] 371NetBSD 1.3.1 1998-03-09 [NBD] (patch release) 372BSD/OS 3.1 1998-03-xx [BSDI] 373OpenBSD 2.3 1998-05-19 [OBD] 374NetBSD 1.3.2 1998-05-29 [NBD] (patch release) 375FreeBSD 2.2.7 1998-07-22 [FBD] 376BSD/OS 4.0 1998-08-xx [BSDI] 377 2-lock MP support, ELF executables 378FreeBSD 3.0 1998-10-16 [FBD] 379 FreeBSD-3.0 is a snapshot from -current, 380 while 3.1 and 3.2 are from 3.x-stable which 381 was branched quite some time after 3.0-release 382FreeBSD 2.2.8 1998-11-29 [FBD] 383OpenBSD 2.4 1998-12-01 [OBD] 384NetBSD 1.3.3 1998-12-23 [NBD] (patch release) 385FreeBSD 3.1 1999-02-15 [FBD] 386BSD/OS 4.0.1 1999-03-xx [BSDI] 387NetBSD 1.4 1999-05-12 [NBD] 388FreeBSD 3.2 1999-05-17 [FBD] 389OpenBSD 2.5 1999-05-19 [OBD] 390NetBSD 1.4.1 1999-08-26 [NBD] (patch release) 391FreeBSD 3.3 1999-09-17 [FBD] 392OpenBSD 2.6 1999-12-01 [OBD] 393FreeBSD 3.4 1999-12-20 [FBD] 394BSD/OS 4.1 1999-12-xx [BSDI] 395FreeBSD 4.0 2000-03-13 [FBD] 396NetBSD 1.4.2 2000-03-19 [NBD] (patch release) 397OpenBSD 2.7 2000-06-15 [OBD] 398FreeBSD 3.5 2000-06-24 [FBD] 399FreeBSD 4.1 2000-07-27 [FBD] 400FreeBSD 3.5.1 2000-07-28 [FBD] 401FreeBSD 4.1.1 2000-09-25 [FBD] (a network-only patch release) 402FreeBSD 4.2 2000-11-21 [FBD] 403NetBSD 1.4.3 2000-11-25 [NBD] (patch release) 404BSD/OS 4.2 2000-11-29 [BSDI] 405OpenBSD 2.8 2000-12-01 [OBD] 406NetBSD 1.5 2000-12-06 [NBD] 407Mac OS X 10.0 2001-03-24 [APL] 408FreeBSD 4.3 2001-04-20 [FBD] 409OpenBSD 2.9 2001-06-01 [OBD] 410NetBSD 1.5.1 2001-07-11 [NBD] (patch release) 411NetBSD 1.5.2 2001-09-13 [NBD] (patch release) 412FreeBSD 4.4 2001-09-18 [FBD] 413Mac OS X 10.1 2001-09-29 [APL] 414OpenBSD 3.0 2001-12-01 [OBD] 415FreeBSD 4.5 2002-01-29 [FBD] 416BSD/OS 4.3 2002-03-14 [WRS] 417OpenBSD 3.1 2002-05-19 [OBD] 418FreeBSD 4.6 2002-06-15 [FBD] 419NetBSD 1.5.3 2002-07-22 [NBD] (patch release) 420FreeBSD 4.6.2 2002-08-15 [FBD] (patch release) 421Mac OS X 10.2 2002-08-23 [APL] 422NetBSD 1.6 2002-09-14 [NBD] 423FreeBSD 4.7 2002-10-08 [FBD] 424OpenBSD 3.2 2002-11-01 [OBD] 425FreeBSD 5.0 2003-01-17 [FBD] 426 FreeBSD 5.0 is a separate branch off of 427 -current, similar to 3.0. 428FreeBSD 4.8 2003-04-03 [FBD] 429NetBSD 1.6.1 2003-04-21 [NBD] (patch release) 430OpenBSD 3.3 2003-05-01 [OBD] 431BSD/OS 5.0 2003-05-?? [WRS] 432FreeBSD 5.1 2003-06-09 [FBD] 433Mac OS X 10.3 2003-10-24 [APL] 434FreeBSD 4.9 2003-10-28 [FBD] 435BSD/OS 5.1 ISE 2003-10-?? [WRS] (final version) 436OpenBSD 3.4 2003-11-01 [OBD] 437FreeBSD 5.2 2004-01-12 [FBD] 438FreeBSD 5.2.1 2004-02-22 [FBD] (patch release) 439NetBSD 1.6.2 2004-03-01 [NBD] (patch release) 440OpenBSD 3.5 2004-04-01 [OBD] 441FreeBSD 4.10 2004-05-27 [FBD] 442DragonFly 1.0 2004-07-12 [DFB] 443OpenBSD 3.6 2004-10-29 [OBD] 444FreeBSD 5.3 2004-11-06 [FBD] 445NetBSD 2.0 2004-12-09 [NBD] 446FreeBSD 4.11 2005-01-25 [FBD] 447DragonFly 1.2.0 2005-04-08 [DFB] 448NetBSD 2.0.2 2005-04-14 [NBD] (security/critical release) 449Mac OS X 10.4 2005-04-29 [APL] 450FreeBSD 5.4 2005-05-09 [FBD] 451OpenBSD 3.7 2005-05-19 [OBD] 452NetBSD 2.0.3 2005-10-31 [NBD] (security/critical release) 453OpenBSD 3.8 2005-11-01 [OBD] 454FreeBSD 6.0 2005-11-01 [FBD] 455NetBSD 2.1 2005-11-02 [NBD] 456NetBSD 3.0 2005-12-23 [NBD] 457DragonFly 1.4.0 2006-01-08 [DFB] 458OpenBSD 3.9 2006-05-01 [OBD] 459FreeBSD 6.1 2006-05-08 [FBD] 460FreeBSD 5.5 2006-05-25 [FBD] 461NetBSD 3.0.1 2006-07-24 [NBD] (security/critical release) 462DragonFly 1.6.0 2006-07-24 [DFB] 463OpenBSD 4.0 2006-11-01 [OBD] 464NetBSD 3.0.2 2006-11-04 [NBD] (security/critical release) 465NetBSD 3.1 2006-11-04 [NBD] 466FreeBSD 6.2 2007-01-15 [FBD] 467DragonFly 1.8.0 2007-01-30 [DFB] 468OpenBSD 4.1 2007-05-01 [OBD] 469 470Bibliography 471------------------------ 472 473Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John 474Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating 475System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1 476 477Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing 478Company, Inc., 1994. ISBN 0-201-54777-5 479 480McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John 481Quarterman. The Design and Implementation of the 4.4BSD Operating 482System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4 483 484McKusick, Marshall Kirk, George Neville-Neil. The Design and 485Implementation of the FreeBSD Operating System. 486Addison-Wesley Professional, Published: Aug 2, 2004. ISBN 0-201-70245-2 487 488Doug McIlroy. Research Unix Reader. 489 490Michael G. Brown. The Role of BSD in the Development of Unix. 491Presented to the Tasmanian Unix Special Interest Group of the 492Australian Computer Society, Hobart, August 1993. 493 494Peter H. Salus. Unix at 25. Byte Magazine, October 1994. 495URL: http://www.byte.com/art/9410/sec8/art3.htm 496 497Andreas Klemm, Lars K�ller. If you're going to San Francisco ... 498Die freien BSD-Varianten von Unix. c't April 1997, page 368ff. 499 500BSD Release Announcements collection. 501URL: http://www.de.FreeBSD.org/de/ftp/releases/ 502 503BSD Hypertext Man Pages 504URL: http://www.FreeBSD.org/cgi/man.cgi 505 506UNIX history graphing project 507URL: http://minnie.tuhs.org/Unix_History/index.html 508 509UNIX history 510URL: http://www.levenez.com/unix/ 511 512James Howard: The BSD Family Tree 513URL: http://ezine.daemonnews.org/200104/bsd_family.html 514("what are the differences between FreeBSD, NetBSD, and OpenBSD?") 515 516 517Acknowledgments 518--------------- 519 520Josh Gilliam for suggestions, bug fixes, and finding very old 521original BSD announcements from Usenet or tapes. 522 523Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages. 524 525-- 526Copyright (c) 1997-2007 Wolfram Schneider <wosch@FreeBSD.ORG> 527URL: http://cvsweb.freebsd.org/src/share/misc/bsd-family-tree 528 529$FreeBSD$ 530