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bsd-family-tree revision 1.5.8.2
      1  1.5.8.1  itojun The UNIX system family tree: Research and BSD
      2  1.5.8.1  itojun ---------------------------------------------
      3      1.1     abs 
      4      1.1     abs First Edition (V1)
      5      1.1     abs      |
      6      1.1     abs Second Edition (V2)
      7      1.1     abs      |
      8      1.1     abs Third Edition (V3)
      9      1.1     abs      |
     10      1.1     abs Fourth Edition (V4)
     11      1.1     abs      |
     12      1.1     abs Fifth Edition (V5)
     13      1.1     abs      |
     14      1.1     abs Sixth Edition (V6) -----*
     15      1.1     abs        \                |
     16      1.1     abs         \               |
     17      1.1     abs          \              |
     18      1.1     abs Seventh Edition (V7)    |
     19      1.1     abs             \           |
     20      1.1     abs              \        1BSD
     21      1.1     abs              32V        |
     22      1.1     abs                \      2BSD---------------*
     23      1.1     abs                 \    /                   |
     24      1.1     abs                  \  /                    |
     25      1.1     abs                   \/                     |
     26      1.1     abs                  3BSD                    |
     27      1.1     abs                   |                      |
     28      1.1     abs                4.0BSD               2.7.9BSD
     29      1.1     abs                   |                      |
     30  1.5.8.1  itojun                4.1BSD --------------> 2.8BSD
     31  1.5.8.1  itojun                   |                      |
     32  1.5.8.1  itojun               4.1aBSD -----------\       |
     33  1.5.8.1  itojun                   |                \     |
     34  1.5.8.1  itojun               4.1bBSD                \   |
     35  1.5.8.1  itojun                   |                    \ |
     36  1.5.8.1  itojun       *------ 4.1cBSD --------------> 2.9BSD
     37  1.5.8.1  itojun      /            |                      |
     38  1.5.8.1  itojun Eighth Edition    |                   2.9BSD-Seismo
     39      1.1     abs      |            |                      |
     40      1.1     abs      +----<--- 4.2BSD               2.9.1BSD
     41      1.1     abs      |            |                      |
     42      1.1     abs      +----<--- 4.3BSD -------------> 2.10BSD
     43      1.1     abs      |            |               /      |
     44      1.1     abs Ninth Edition     |              / 2.10.1BSD
     45      1.1     abs      |         4.3BSD Tahoe-----+        |
     46      1.1     abs      |            |              \       |
     47      1.1     abs      |            |                \     |
     48      1.1     abs      v            |                  2.11BSD
     49      1.1     abs Tenth Edition     |                      |
     50  1.5.8.1  itojun                   |                  2.11BSD rev #430
     51      1.1     abs                4.3BSD NET/1              |
     52      1.1     abs                   |                      v
     53      1.1     abs                4.3BSD Reno
     54      1.1     abs                   |
     55      1.1     abs    *---------- 4.3BSD NET/2 -------------------+-------------*
     56      1.1     abs    |                    |                      |             |
     57  1.5.8.2      he 386BSD 0.0              |                      |           BSD/386 ALPHA
     58      1.1     abs    |                    |                      |             |
     59  1.5.8.2      he 386BSD 0.1 ------------>+                      |           BSD/386 0.3.[13]
     60      1.1     abs    |     \              |                  4.4BSD Alpha      |
     61  1.5.8.2      he    |     386BSD 1.0     |                      |           BSD/386 0.9.[34]
     62      1.1     abs    |                    |                  4.4BSD            |
     63      1.1     abs    |                    |                    / |             |
     64      1.1     abs    |                    |   4.4BSD-Encumbered  |             |
     65  1.5.8.2      he    |                 NetBSD 0.8                |           BSD/386 1.0
     66      1.1     abs    |                    |                      |             |
     67  1.5.8.2      he FreeBSD 1.0          NetBSD 0.9                |           BSD/386 1.1
     68  1.5.8.2      he    |                    |           .----- 4.4BSD Lite       |
     69  1.5.8.2      he FreeBSD 1.1             |          /   /       |     \       |
     70  1.5.8.2      he    |                    |         /   /        |      \      |
     71  1.5.8.2      he FreeBSD 1.1.5       .---|--------'   /         |       \     |
     72  1.5.8.2      he    |               /    |           /          |        \    |
     73  1.5.8.2      he FreeBSD 1.1.5.1   /     |          /           |         \   |
     74  1.5.8.2      he    |             /   NetBSD 1.0 <-'            |          \  |
     75  1.5.8.2      he    |            /       |                      |           \ |
     76  1.5.8.2      he FreeBSD 2.0 <--'        |                      |           BSD/OS 2.0
     77  1.5.8.2      he    |                     \                     |             |
     78  1.5.8.2      he FreeBSD 2.0.5             \                    |           BSD/OS 2.0.1
     79  1.5.8.2      he    |                       \         .--- 4.4BSD Lite2       |
     80  1.5.8.2      he    |                        \        |       |   |   |       |
     81  1.5.8.2      he    |                         |   FreeBSD 3.0 |   |   |       |
     82  1.5.8.2      he    |                         |        NetBSD 1.3 |   |       |
     83  1.5.8.2      he    |                         |           OpenBSD 2.3 |       |
     84  1.5.8.2      he    |                         |                BSD/OS 3.0     |
     85  1.5.8.2      he FreeBSD 2.1                  |                               |
     86  1.5.8.2      he  |   |                    NetBSD 1.1 ------.               BSD/OS 2.1
     87  1.5.8.2      he  | FreeBSD 2.1.5             |              \                |
     88  1.5.8.2      he  |     |                  NetBSD 1.2         \             BSD/OS 3.0
     89  1.5.8.2      he  | FreeBSD 2.1.6             |  \          OpenBSD 2.0       |
     90  1.5.8.2      he  |     |                     |   \             |             |
     91  1.5.8.2      he  | FreeBSD 2.1.6.1           |    \            |             |
     92  1.5.8.2      he  |     |                     |     \           |             |
     93  1.5.8.2      he  | FreeBSD 2.1.7             |      |          |             |
     94  1.5.8.2      he  |     |                     |  NetBSD 1.2.1   |             |
     95  1.5.8.2      he  | FreeBSD 2.1.7.1           |                 |             |
     96  1.5.8.2      he  |                           |                 |             |
     97  1.5.8.2      he  |                           |                 |             |
     98  1.5.8.2      he  *-FreeBSD 2.2               |                 |             |
     99  1.5.8.2      he  |        \                  |                 |             |
    100  1.5.8.2      he  |     FreeBSD 2.2.1         |                 |             |
    101  1.5.8.2      he  |         |                 |                 |             |
    102  1.5.8.2      he  |     FreeBSD 2.2.2         |             OpenBSD 2.1       |
    103  1.5.8.2      he  |         |                 |                 |             |
    104  1.5.8.2      he  |     FreeBSD 2.2.5         |                 |             |
    105  1.5.8.2      he  |         |                 |             OpenBSD 2.2       |
    106  1.5.8.2      he  |         |              NetBSD 1.3           |             |
    107  1.5.8.2      he  |     FreeBSD 2.2.6         |    |            |             |
    108  1.5.8.2      he  |         |                 | NetBSD 1.3.1    |           BSD/OS 3.1
    109  1.5.8.2      he  |         |                 |    |        OpenBSD 2.3       |
    110  1.5.8.2      he  |         |                 | NetBSD 1.3.2    |             |
    111  1.5.8.2      he  |     FreeBSD 2.2.7         |    |            |             |
    112  1.5.8.2      he  |         |                 |    |            |           BSD/OS 4.0
    113  1.5.8.2      he  |         v                 |    |            |             |
    114  1.5.8.2      he  |     FreeBSD 2.2.8         |    |            |             |
    115  1.5.8.2      he  |                           |    |            |             |
    116  1.5.8.2      he  |                           |    |        OpenBSD 2.4       |
    117  1.5.8.2      he FreeBSD 3.0                  |    v            |             |
    118  1.5.8.2      he  |                           | NetBSD 1.3.3    |             |
    119  1.5.8.2      he  *---FreeBSD 3.1             |                 |             |
    120  1.5.8.2      he  |       |                   |                 |           BSD/OS 4.0.1
    121  1.5.8.2      he  |   FreeBSD 3.2          NetBSD 1.4       OpenBSD 2.5       |
    122  1.5.8.2      he  |       |                   |    |            |             |
    123  1.5.8.2      he  |   FreeBSD 3.3             | NetBSD 1.4.1    |             |
    124  1.5.8.2      he  |       |                   |    |        OpenBSD 2.6       |
    125  1.5.8.2      he  |   FreeBSD 3.4             |    |            |             |
    126  1.5.8.2      he  |           |               |    |            |           BSD/OS 4.1
    127  1.5.8.2      he FreeBSD 4.0  |               | NetBSD 1.4.2    |             |
    128  1.5.8.2      he  |           |               |    |            |             |
    129  1.5.8.2      he  |           |               |    |            |             |
    130  1.5.8.2      he  |   FreeBSD 3.5             |    |        OpenBSD 2.7       |
    131  1.5.8.2      he  |           |               |    |            |             |
    132  1.5.8.2      he  |   FreeBSD 3.5.1           |    |            |             |
    133  1.5.8.2      he  |                           |    |            |             |
    134  1.5.8.2      he  *---FreeBSD 4.1             |    |            |             |
    135  1.5.8.2      he  |      |                    |    |            |             |
    136  1.5.8.2      he  |   FreeBSD 4.1.1           |    |            |             |
    137  1.5.8.2      he  |      |                    |    v            |             |
    138  1.5.8.2      he  |   FreeBSD 4.2             | NetBSD 1.4.3    |             |
    139  1.5.8.2      he  |      |                    |             OpenBSD 2.8     BSD/OS 4.2
    140  1.5.8.2      he  |      v                 NetBSD 1.5           |             |
    141  1.5.8.2      he  |                           |                 |             v
    142  1.5.8.1  itojun  |                           |                 |
    143  1.5.8.1  itojun FreeBSD 5.0-current       NetBSD -current  OpenBSD -current
    144  1.5.8.1  itojun  |                           |                 |
    145  1.5.8.1  itojun  v                           v                 v
    146      1.1     abs 
    147      1.1     abs 
    148      1.1     abs Time
    149      1.1     abs ----------------
    150      1.1     abs 
    151  1.5.8.2      he Time tolerance +/- 6 months, depending on which book/article you read; if it
    152  1.5.8.2      he was the announcement in Usenet or if it was available as tape.
    153      1.1     abs 
    154      1.1     abs [44B] McKusick, Marshall Kirk, Keith Bostic, Michael J Karels,
    155      1.1     abs 	and John Quarterman. The Design and Implementation of
    156      1.1     abs 	the 4.4BSD Operating System.
    157      1.1     abs [DOC] README, COPYRIGHT on tape.
    158      1.1     abs [QCU] Salus, Peter H. A quarter century of UNIX.
    159      1.1     abs [U25] Peter H. Salus. Unix at 25.
    160      1.1     abs [USE] Usenet announcement.
    161      1.1     abs [KSJ] Michael J. Karels, Carl F. Smith, and William F. Jolitz.
    162      1.1     abs 	Changes in the Kernel in 2.9BSD. Second Berkeley Software
    163      1.1     abs 	Distribution UNIX Version 2.9, July, 1983.
    164      1.1     abs [KB]  Keith Bostic. BSD2.10 available from Usenix. comp.unix.sources,
    165      1.1     abs 	Volume 11, Info 4, April, 1987.
    166      1.1     abs [KKK] Mike Karels, Kirk McKusick, and Keith Bostic. tahoe announcement.
    167      1.1     abs 	comp.bugs.4bsd.ucb-fixes, June 15, 1988.
    168      1.1     abs [SMS] Steven M. Schultz. 2.11BSD, UNIX for the PDP-11.
    169      1.1     abs [FBD] FreeBSD Project, The.
    170      1.1     abs [NBD] NetBSD Project, The.
    171      1.1     abs [OBD] OpenBSD Project, The.
    172      1.1     abs [dmr] Dennis Ritchie, via E-Mail
    173  1.5.8.2      he [BSDI] Berkeley Software Design, Inc.
    174      1.1     abs 
    175      1.1     abs Multics                 1965
    176  1.5.8.1  itojun UNIX                    Summer 1969
    177      1.1     abs 				DEC PDP-7
    178      1.1     abs First   Edition         1971-11-03 [QCU]
    179      1.1     abs 				DEC PDP-11/20, Assembler
    180      1.1     abs Second  Edition         1972-06-12 [QCU]
    181  1.5.8.1  itojun 				10 UNIX installations
    182      1.1     abs Third   Edition         1973-02-xx [QCU]
    183      1.1     abs 				Pipes, 16 installations
    184      1.1     abs Fourth  Edition         1973-11-xx [QCU]
    185      1.1     abs 				rewriting in C effected,
    186      1.1     abs                                 above 30 installations
    187      1.1     abs Fifth   Edition         1974-06-xx [QCU]
    188      1.1     abs 				above 50 installations
    189      1.1     abs Sixth   Edition         1975-05-xx [QCU]
    190      1.1     abs 				port to DEC Vax
    191      1.1     abs Seventh Edition         1979-01-xx [QCU]
    192  1.5.8.1  itojun 				first portable UNIX
    193  1.5.8.1  itojun Eighth  Edition         1985-02-xx [QCU]
    194      1.1     abs 				VAX 11/750, VAX 11/780 [dmr]
    195      1.1     abs 				descended from 4.1c BSD [dmr]
    196      1.1     abs 				descended from 4.1 BSD [44B]
    197  1.5.8.2      he 			scooping-out and replacement of the character-device
    198      1.1     abs 			and networking part by the streams mechanism
    199      1.1     abs 
    200      1.1     abs Ninth   Edition         1986-09-xx [QCU]
    201      1.1     abs Tenth   Edition         1989-10-xx [QCU]
    202      1.1     abs 
    203      1.1     abs 1BSD                    late 1977
    204      1.1     abs 			1978-03-09 [QCU]
    205      1.1     abs 				PDP-11, Pascal, ex(1)
    206      1.1     abs 				30 free copies of 1BSD sent out
    207      1.1     abs 				35 tapes sold for 50 USD [QCU]
    208      1.1     abs 2BSD                    mid 1978 [QCU]
    209      1.1     abs 				75 2BSD tapes shipped
    210      1.1     abs 2.7.9BSD		?? [SMS]
    211      1.1     abs 2.8BSD			1981-07-xx [KSJ]
    212      1.1     abs 
    213      1.1     abs 2.8.1BSD		1982-01-xx [QCU]
    214      1.1     abs 				set of performance improvements
    215      1.1     abs 2.9BSD			1983-07-xx [KSJ]
    216      1.1     abs 2.9.1BSD                1983-11-xx
    217      1.1     abs 2.9BSD-Seismo		1985-08-xx [SMS]
    218      1.1     abs 2.10BSD			1987-04-xx [KKK]
    219      1.1     abs 2.10.1BSD		1989-01-xx [SMS]
    220      1.1     abs 2.11BSD			1992-02-xx [SMS]
    221  1.5.8.1  itojun 2.11BSD rev #430	1999-12-13 [SMS]
    222      1.1     abs 
    223      1.1     abs 32V			1978-1[01]-xx [QCU]
    224      1.1     abs 3BSD                    late 1979 [QCU]
    225      1.1     abs 				virtual memory, page replacement,
    226      1.1     abs                         	demand paging
    227      1.1     abs 4.0BSD                  1980-10-xx
    228      1.1     abs 4.1BSD                  1981-06-xx
    229      1.1     abs 4.1aBSD                 1982-04-xx
    230      1.1     abs 				alpha release, 100 sites, networking [44B]
    231      1.1     abs 4.1bBSD				internal release, fast filesystem [44B]
    232      1.1     abs 4.1cBSD                 late 1982
    233      1.1     abs 				beta release, IPC [44B]
    234      1.1     abs 4.2BSD                  1983-09-xx [QCU]
    235      1.1     abs 4.3BSD                  1986-06-xx [QCU]
    236      1.1     abs 			1986-04-xx [KB]
    237      1.1     abs 4.3BSD Tahoe            1988-06-xx [QCU]
    238      1.1     abs 4.3BSD NET/1            1988-11-xx [QCU]
    239      1.1     abs 4.3BSD Reno             1990-06-xx [QCU], [DOC]
    240      1.1     abs 4.3BSD NET/2            1991-06-xx [QCU]
    241  1.5.8.2      he 
    242  1.5.8.2      he BSD/386 ALPHA		1991-12-xx [BSDI]
    243  1.5.8.2      he 				first code released to people outside BSDI
    244      1.1     abs 386BSD 0.0              1992-02-xx [DOC]
    245  1.5.8.2      he BSD/386 0.3.1	        1992-04-xx [BSDI] first ext. beta; B customers
    246  1.5.8.2      he BSD/386 0.3.3		1992-06-xx [BSDI] first CDROM version
    247  1.5.8.2      he 386BSD 0.1              1992-07-28 [DOC]
    248      1.1     abs 4.4BSD Alpha            1992-07-07
    249  1.5.8.2      he BSD/386 0.9.3		1992-10-xx [BSDI]
    250  1.5.8.2      he 				first external gamma; G customers
    251  1.5.8.2      he BSD/386 0.9.4		1992-12-xx [BSDI]
    252  1.5.8.2      he 				would have been 1.0 except for request
    253  1.5.8.2      he 				for preliminary injunction
    254  1.5.8.2      he BSD/386 1.0 		1993-03-xx [BSDI]
    255  1.5.8.2      he 				injunction denied; first official release
    256  1.5.8.1  itojun NetBSD 0.8              1993-04-20 [NBD]
    257      1.1     abs 4.4BSD                  1993-06-01 [USE]
    258      1.1     abs NetBSD 0.9              1993-08-23 [NBD]
    259  1.5.8.1  itojun FreeBSD 1.0		1993-11-xx [FOO]
    260  1.5.8.2      he BSD/386 1.1		1994-02-xx [BSDI]
    261      1.1     abs 4.4BSD Lite             1994-03-01 [USE]
    262  1.5.8.1  itojun FreeBSD 1.1		1994-04-xx [FBD]
    263  1.5.8.1  itojun FreeBSD 1.1.5.1		1994-07-xx [FBD]
    264  1.5.8.1  itojun 				supersedes 1.1.5 3 days after release.
    265  1.5.8.1  itojun NetBSD 1.0              1994-10-26 [NBD]
    266      1.1     abs 386BSD 1.0              1994-11-12 [USE]
    267  1.5.8.1  itojun FreeBSD 2.0		1995-01-xx [FBD]
    268  1.5.8.2      he BSD/OS 2.0		1995-01-xx [BSDI] 4.4 lite based
    269  1.5.8.2      he FreeBSD 2.0.5		1995-06-10 [FBD]
    270  1.5.8.2      he BSD/OS 2.0.1		1995-06-xx [BSDI]
    271  1.5.8.1  itojun 4.4BSD Lite Release 2	1995-06-xx [44B]
    272  1.5.8.1  itojun 				the true final distribution from the CSRG
    273  1.5.8.2      he FreeBSD 2.1.0		1995-11-19 [FBD]
    274      1.1     abs NetBSD 1.1              1995-11-26 [NBD]
    275  1.5.8.2      he BSD/OS 2.1		1996-01-xx [BSDI]
    276  1.5.8.2      he FreeBSD 2.1.5		1996-07-14 [FBD]
    277      1.1     abs NetBSD 1.2              1996-10-04 [NBD]
    278      1.1     abs OpenBSD 2.0             1996-10-18 [OBD]
    279  1.5.8.2      he FreeBSD 2.1.6		1996-11-16 [FBD]
    280  1.5.8.2      he FreeBSD 2.1.6.1		1996-11-25 [FBD] (sendmail security release)
    281  1.5.8.2      he FreeBSD 2.1.7		1997-02-20 [FBD]
    282  1.5.8.2      he BSD/OS 3.0		1997-02-xx [BSDI] 4.4 lite2 based
    283  1.5.8.2      he FreeBSD 2.2.0		1997-03-16 [FBD]
    284  1.5.8.2      he FreeBSD 2.2.1		1997-03-25 [FBD]
    285  1.5.8.2      he FreeBSD 2.2.2		1997-05-16 [FBD]
    286  1.5.8.1  itojun NetBSD 1.2.1            1997-05-20 [NBD] (patch release)
    287      1.1     abs OpenBSD 2.1             1997-06-01 [OBD]
    288  1.5.8.2      he FreeBSD 2.2.5		1997-10-22 [FBD]
    289      1.1     abs OpenBSD 2.2             1997-12-01 [OBD]
    290      1.5     abs NetBSD 1.3              1998-01-04 [NBD]
    291  1.5.8.2      he FreeBSD 2.2.6		1998-03-25 [FBD]
    292  1.5.8.1  itojun NetBSD 1.3.1            1998-03-09 [NBD] (patch release)
    293  1.5.8.2      he BSD/OS 3.1		1998-03-xx [BSDI]
    294      1.1     abs OpenBSD 2.3             1998-05-19 [OBD]
    295  1.5.8.1  itojun NetBSD 1.3.2            1998-05-29 [NBD] (patch release)
    296  1.5.8.2      he FreeBSD 2.2.7		1998-07-22 [FBD]
    297  1.5.8.2      he BSD/OS 4.0		1998-08-xx [BSDI]
    298  1.5.8.2      he 				2-lock MP support, ELF executables
    299  1.5.8.1  itojun FreeBSD 3.0		1998-10-16 [FBD]
    300  1.5.8.2      he 				FreeBSD-3.0 is a snapshot from -current,
    301  1.5.8.2      he 				while 3.1 and 3.2 are from 3.x-stable which
    302  1.5.8.1  itojun 				was branched quite some time after 3.0-release
    303      1.1     abs FreeBSD 2.2.8           1998-11-29 [FBD]
    304      1.1     abs OpenBSD 2.4             1998-12-01 [OBD]
    305  1.5.8.1  itojun NetBSD 1.3.3            1998-12-23 [NBD] (patch release)
    306  1.5.8.1  itojun FreeBSD 3.1		1999-02-15 [FBD]
    307  1.5.8.2      he BSD/OS 4.0.1		1999-03-xx [BSDI]
    308      1.4     abs NetBSD 1.4              1999-05-12 [NBD]
    309  1.5.8.1  itojun FreeBSD 3.2             1999-05-17 [FBD]
    310      1.4     abs OpenBSD 2.5             1999-05-19 [OBD]
    311  1.5.8.1  itojun NetBSD 1.4.1            1999-08-26 [NBD] (patch release)
    312  1.5.8.1  itojun FreeBSD 3.3             1999-09-17 [FBD]
    313  1.5.8.1  itojun OpenBSD 2.6             1999-12-01 [OBD]
    314  1.5.8.1  itojun FreeBSD 3.4             1999-12-20 [FBD]
    315  1.5.8.2      he BSD/OS 4.1		1999-12-xx [BSDI]
    316  1.5.8.1  itojun FreeBSD 4.0             2000-03-13 [FBD]
    317  1.5.8.1  itojun NetBSD 1.4.2            2000-03-19 [NBD] (patch release)
    318  1.5.8.1  itojun OpenBSD 2.7             2000-06-15 [OBD]
    319  1.5.8.1  itojun FreeBSD 3.5		2000-06-24 [FBD]
    320  1.5.8.1  itojun FreeBSD 4.1		2000-07-27 [FBD]
    321  1.5.8.1  itojun FreeBSD 3.5.1		2000-07-28 [FBD]
    322  1.5.8.1  itojun FreeBSD 4.1.1		2000-09-25 [FBD] (a network-only patch release)
    323  1.5.8.2      he FreeBSD 4.2  		2000-11-21 [FBD]
    324  1.5.8.2      he NetBSD 1.4.3		2000-11-25 [NBD] (patch release)
    325  1.5.8.2      he BSD/OS 4.2		2000-11-29 [BSDI]
    326  1.5.8.2      he OpenBSD 2.8		2000-12-01 [OBD]
    327  1.5.8.2      he NetBSD 1.5              2000-12-06 [NBD]
    328      1.1     abs 
    329      1.1     abs 
    330      1.1     abs Bibliography
    331      1.1     abs ------------------------
    332      1.1     abs 
    333      1.1     abs Leffler, Samuel J., Marshall Kirk McKusick, Michael J Karels and John
    334      1.1     abs Quarterman. The Design and Implementation of the 4.3BSD UNIX Operating
    335      1.1     abs System. Reading, Mass. Addison-Wesley, 1989. ISBN 0-201-06196-1
    336      1.1     abs 
    337      1.1     abs Salus, Peter H. A quarter century of UNIX. Addison-Wesley Publishing
    338      1.1     abs Company, Inc., 1994. ISBN 0-201-54777-5
    339      1.1     abs 
    340      1.1     abs McKusick, Marshall Kirk, Keith Bostic, Michael J Karels, and John
    341      1.1     abs Quarterman. The Design and Implementation of the 4.4BSD Operating
    342      1.1     abs System. Reading, Mass. Addison-Wesley, 1996. ISBN 0-201-54979-4
    343      1.1     abs 
    344      1.1     abs Doug McIlroy. Research Unix Reader.
    345      1.1     abs 
    346      1.1     abs Michael G. Brown. The Role of BSD in the Development of Unix.
    347      1.1     abs Presented to the Tasmanian Unix Special Interest Group of the
    348      1.1     abs Australian Computer Society, Hobart, August 1993.
    349      1.1     abs 
    350  1.5.8.1  itojun Peter H. Salus. Unix at 25. Byte Magazine, October 1994.
    351      1.1     abs URL: http://www.byte.com/art/9410/sec8/art3.htm
    352      1.1     abs 
    353      1.1     abs Andreas Klemm, Lars Kller. If you're going to San Francisco ...
    354      1.1     abs Die freien BSD-Varianten von Unix. c't April 1997, page 368ff.
    355      1.1     abs 
    356      1.1     abs BSD Release Announcements collection.
    357  1.5.8.1  itojun URL: http://www.de.FreeBSD.org/de/ftp/releases/
    358      1.1     abs 
    359      1.1     abs BSD Hypertext Man Pages
    360  1.5.8.1  itojun http://www.FreeBSD.org/cgi/man.cgi
    361  1.5.8.1  itojun 
    362  1.5.8.1  itojun UNIX history graphing project
    363  1.5.8.1  itojun http://minnie.cs.adfa.edu.au/Unix_History/index.html
    364  1.5.8.1  itojun 
    365  1.5.8.1  itojun UNIX history
    366  1.5.8.1  itojun http://perso.wanadoo.fr/levenez/unix/
    367      1.1     abs 
    368      1.1     abs Acknowledgments
    369      1.1     abs ---------------
    370      1.1     abs 
    371  1.5.8.1  itojun Josh Gilliam for suggestions, bug fixes, and finding very old
    372      1.1     abs original BSD announcements from Usenet or tapes.
    373      1.1     abs 
    374      1.1     abs Steven M. Schultz for providing 2.8BSD, 2.10BSD, 2.11BSD manual pages.
    375      1.1     abs 
    376      1.1     abs --
    377  1.5.8.2      he Copyright (c) 1997-2000 Wolfram Schneider <wosch (a] FreeBSD.ORG>
    378  1.5.8.2      he URL: ftp://ftp.freebsd.org/pub/FreeBSD/branches/-current/src/share/misc/bsd-family-tree
    379      1.1     abs 
    380  1.5.8.2      he $FreeBSD: src/share/misc/bsd-family-tree,v 1.38 2001/01/19 07:36:36 itojun Exp $
    381      1.1     abs 
    382  1.5.8.2      he $NetBSD: bsd-family-tree,v 1.5.8.2 2001/02/03 18:32:32 he Exp $
    383