311:
30:
296:
1809:
1216:
1821:
371:
was an edited selection of the main parts of the kernel as implemented for a
Digital PDP-11/40, and was the main source of kernel documentation for many early Unix developers. Due to license restrictions on later Unix versions, the book was mainly distributed by
437:
Around the same time, a Bell Labs port to the
Interdata 8/32 was completed, but not externally released. The goal of this port was to improve the portability of Unix more generally, as well to produce a portable version of the C compiler. The resulting
425:. Wollongong Unix was the first ever port to a platform other than the PDP series of computers, proving that portable operating systems were indeed feasible, and that C was the language in which to write them. In 1980, this version was licensed to
505:
released the
Australian Unix Share Accounting Method (AUSAM) in January 1978, a V6 variant with improved security and process accounting, in addition to the fifty fixes that leaked out of Bell Labs. There were several subsequent releases.
270:
to educational institutions only, but licensed
Version 6 also to commercial users for $ 20,000, and it remained the most widely used version into the 1980s. An enhanced V6 was the basis of the first ever commercially sold Unix version,
493:
After AT&T decided the distribution by Bell Labs of a number of pre-V7 bug fixes would constitute support (disallowed by an antitrust settlement) a tape with the patchset was slipped to Lou Katz of
366:
330:
693:
718:
418:
in practice. Their "Wollongong
Interdata UNIX, Level 6" also included utilities developed at Wollongong, and later releases had features of V7, notably its
1867:
1852:
543:
339:. Since source code was available and the license was not explicit enough to forbid it, V6 was taken up as a teaching tool, notably by the
1006:
810:
340:
478:
Bell Labs developed several variants of V6, including the stripped-down MINI-UNIX for low-end PDP-11 models, LSI-UNIX or LSX for the
579:
Quarterman, John S.; Silberschatz, Abraham; Peterson, James L. (December 1985). "4.2BSD and 4.3BSD as examples of the Unix system".
1140:
777:
517:
509:
272:
628:
1331:
1252:
661:
355:
928:
686:
973:
348:
246:
149:
1790:
1596:
1500:
1076:
487:
1455:
483:
310:
1847:
1784:
1739:
1370:
1219:
57:
1230:
1485:
1201:
419:
415:
344:
284:
69:
1196:
711:
29:
999:
528:
466:
virtualization environment. This version became the nucleus of Amdahl's first internal UNIX offering. (see
1872:
1862:
1630:
588:
166:
1857:
1778:
463:
459:
407:
406:
In 1977, Richard Miller and Ross Nealon, working under the supervision of professor Juris
Reinfelds at
1773:
1676:
655:"Letter from Caldera announcing the release of the source to older versions of UNIX as free software"
502:
426:
184:
64:
864:
593:
1690:
1272:
968:
439:
263:
187:
1705:
1245:
992:
890:
769:
738:
606:
1711:
1283:
1115:
73:
1825:
1318:
1268:
957:
882:
843:
761:
598:
536:
238:
178:
139:
134:
803:
442:(PCC) was distributed with V7 and many later versions of Unix, and was used to produce the
1298:
1293:
1288:
1155:
1135:
1092:
1551:
1175:
1160:
1130:
1120:
1041:
765:
742:
532:
411:
295:
279:
1.0 was also based on V6, where earlier (unreleased) versions were based on V4 and V5.
267:
257:
215:
205:
170:
159:
1841:
1813:
1658:
1649:
1512:
1363:
1303:
1238:
1098:
1027:
869:
462:
in 1976–1977, where the Unix kernel was adapted to run as a guest operating on IBM's
382:
260:
in 1978/1979, although V6 systems remained in regular operation until at least 1985.
191:
894:
773:
746:
1480:
1475:
1180:
842:. Fifth ACM Symposium on Operating Systems Principles. Austin, TX. pp. 33–42.
654:
610:
559:
524:
253:
127:
952:
916:
1746:
1557:
1165:
1150:
414:, thus proving the portability of Unix and its new systems programming language
386:
336:
303:
280:
195:
886:
835:
1767:
1664:
1571:
1546:
1490:
1460:
1308:
467:
362:
299:
52:
840:
Proceedings of the fifth symposium on
Operating systems principles - SOSP '75
245:. It was released in May 1975 and, like its direct predecessor, targeted the
1602:
1265:
1145:
1019:
390:
242:
848:
546:
in 2002 through 2006, and subsequently replaced by a simpler clone called
1760:
1612:
1578:
1465:
1420:
1405:
1170:
1125:
1070:
1047:
443:
422:
374:
276:
1732:
1725:
1718:
1563:
1529:
1400:
1385:
1358:
1348:
1064:
531:, later augmented for partial compatibility with BSD Unix) and for the
602:
358:
or 1BSD, which later became a complete operating system distribution.
1700:
1619:
1495:
1470:
1434:
1390:
1353:
1342:
513:
495:
479:
381:
The source code for the original V6 Unix was later made available as
249:
152:
39:
984:
283:
produced and marketed a (binary-compatible) V6 clone under the name
629:"The Unix Tutorial / Part 3: Unix in the Microcomputer Marketplace"
1753:
1670:
1637:
1624:
1534:
1446:
1427:
1413:
1375:
309:
294:
962:
615:
There are even some
Version 6 systems still in regular operation.
1540:
1523:
1395:
1261:
1015:
976:; Richard Miller's account of porting Unix to the Interdata 7/32
878:
323:
319:
235:
83:
43:
35:
1234:
988:
1643:
1607:
1380:
547:
447:
527:, clones of V6 Unix appeared for local-built PDP-11 clones (
354:
UC Berkeley distributed a set of add-on programs called the
16:
6th
Edition of Research Unix alias UNIX Time-Sharing System
335:
V6 Unix was released as a distribution including the full
804:"A Unix operating system for the DEC VAX-11/780 computer"
979:
836:"MERT - a multi-environment real-time operating system"
331:
Lions' Commentary on UNIX 6th
Edition, with Source Code
1689:
1588:
1509:
1444:
1328:
1317:
1189:
1108:
1085:
1057:
1026:
211:
201:
177:
158:
145:
133:
123:
105:
97:
89:
79:
63:
51:
969:Unix V6 documents, e.g. C Reference, and man pages
458:A third Unix portability project was completed at
747:"Portability of C Programs and the UNIX System"
486:UNIX/RT, which merged V6 Unix and the earlier
1246:
1000:
429:in Palo Alto that published it as Edition 7.
8:
22:
1325:
1253:
1239:
1231:
1007:
993:
985:
733:
731:
21:
865:"The Strange Birth and Long Life of Unix"
847:
802:Thomas B. London; John F. Reiser (1978).
592:
965:– Web interface to the V6 manual pages.
571:
958:Wollongong Interdata UNIX source code
783:from the original on 18 December 2021
516:version for office automation called
410:, completed a port of V6 Unix to the
7:
1820:
921:Oak Ridge National Laboratory Review
356:First Berkeley Software Distribution
834:Bayer, D. L.; Lycklama, H. (1975).
980:Unix v6 for PDP-11 online emulator
766:10.1002/j.1538-7305.1978.tb02141.x
341:University of California, Berkeley
14:
1819:
1808:
1807:
1215:
1214:
863:Toomey, Warren (December 2011).
724:from the original on 2011-08-15.
699:from the original on 2015-07-04.
28:
1868:Free software operating systems
1806:indicate discontinued systems.
931:from the original on 2023-07-31
915:McCulloch, R.D. (Summer 1981).
816:from the original on 2015-06-11
667:from the original on 2009-02-19
510:Interactive Systems Corporation
234:, was the first version of the
1853:Discontinued operating systems
627:Fiedler, Ryan (October 1983).
368:Commentary on UNIX 6th Edition
1:
349:University of New South Wales
542:V6 was used for teaching at
241:to see wide release outside
1791:Windows Subsystem for Linux
111:; 49 years ago
1889:
887:10.1109/MSPEC.2011.6085780
484:real-time operating system
328:
58:AT&T Bell Laboratories
1799:
1785:Windows Services for UNIX
1740:Microsoft POSIX subsystem
1279:
1210:
1197:AT&T Computer Systems
27:
1202:Unix System Laboratories
917:"Putting it on the Line"
687:"The First Port of UNIX"
498:, who distributed them.
345:Johns Hopkins University
474:Variants and extensions
256:. It was superseded by
326:
307:
167:Command-line interface
1779:UserLAnd Technologies
849:10.1145/800213.806519
712:"The First Unix Port"
512:released an enhanced
408:Wollongong University
313:
298:
1774:UNIX System Services
1273:compatibility layers
503:University of Sydney
427:The Wollongong Group
275:'s IS/1. Bell's own
264:AT&T Corporation
1501:Other distributions
974:The First Unix Port
754:Bell System Tech. J
535:personal computer (
440:Portable C Compiler
188:commercial software
24:
1077:MERT/DMERT/UNIX-RT
327:
308:
302:' original books,
224:Sixth Edition Unix
1835:
1834:
1685:
1684:
1269:operating systems
1228:
1227:
1116:Stephen R. Bourne
685:Juris Reinfelds.
603:10.1145/6041.6043
581:Computing Surveys
539:, based on LSX).
314:Browsing through
221:
220:
42:, running in the
1880:
1848:Bell Labs Unices
1823:
1822:
1811:
1810:
1326:
1255:
1248:
1241:
1232:
1218:
1217:
1009:
1002:
995:
986:
940:
939:
937:
936:
912:
906:
905:
903:
901:
860:
854:
853:
851:
831:
825:
824:
822:
821:
815:
808:
799:
793:
792:
790:
788:
782:
760:(6): 2021–2048.
751:
735:
726:
725:
723:
716:
710:Richard Miller.
707:
701:
700:
698:
691:
682:
676:
675:
673:
672:
666:
659:
651:
645:
644:
642:
640:
624:
618:
617:
596:
576:
239:operating system
124:Marketing target
119:
117:
112:
46:PDP-11 simulator
32:
25:
19:Operating system
1888:
1887:
1883:
1882:
1881:
1879:
1878:
1877:
1838:
1837:
1836:
1831:
1795:
1692:
1681:
1584:
1505:
1440:
1320:
1313:
1275:
1259:
1229:
1224:
1206:
1185:
1156:Douglas McIlroy
1136:Brian Kernighan
1104:
1093:UNIX System III
1081:
1053:
1022:
1013:
963:Unix V6 Manuals
949:
944:
943:
934:
932:
914:
913:
909:
899:
897:
862:
861:
857:
833:
832:
828:
819:
817:
813:
806:
801:
800:
796:
786:
784:
780:
749:
737:
736:
729:
721:
714:
709:
708:
704:
696:
689:
684:
683:
679:
670:
668:
664:
657:
653:
652:
648:
638:
636:
626:
625:
621:
594:10.1.1.117.9743
578:
577:
573:
568:
556:
476:
456:
435:
404:
399:
378:photo-copying.
361:UNSW professor
333:
293:
161:
115:
113:
110:
106:Initial release
47:
20:
17:
12:
11:
5:
1886:
1884:
1876:
1875:
1870:
1865:
1860:
1855:
1850:
1840:
1839:
1833:
1832:
1830:
1829:
1817:
1800:
1797:
1796:
1794:
1793:
1788:
1781:
1776:
1771:
1764:
1757:
1750:
1743:
1736:
1729:
1722:
1715:
1708:
1703:
1697:
1695:
1687:
1686:
1683:
1682:
1680:
1679:
1674:
1667:
1662:
1655:
1654:
1653:
1641:
1634:
1627:
1622:
1617:
1616:
1615:
1605:
1600:
1592:
1590:
1586:
1585:
1583:
1582:
1575:
1568:
1567:
1566:
1561:
1549:
1544:
1537:
1532:
1527:
1519:
1517:
1507:
1506:
1504:
1503:
1498:
1493:
1488:
1483:
1478:
1473:
1468:
1463:
1458:
1452:
1450:
1442:
1441:
1439:
1438:
1431:
1424:
1417:
1410:
1409:
1408:
1403:
1398:
1393:
1388:
1383:
1378:
1368:
1367:
1366:
1361:
1356:
1351:
1338:
1336:
1323:
1315:
1314:
1312:
1311:
1306:
1301:
1296:
1291:
1286:
1280:
1277:
1276:
1260:
1258:
1257:
1250:
1243:
1235:
1226:
1225:
1223:
1222:
1211:
1208:
1207:
1205:
1204:
1199:
1193:
1191:
1187:
1186:
1184:
1183:
1178:
1176:Dennis Ritchie
1173:
1168:
1163:
1161:Lee E. McMahon
1158:
1153:
1148:
1143:
1138:
1133:
1131:Stuart Feldman
1128:
1123:
1121:Lorinda Cherry
1118:
1112:
1110:
1106:
1105:
1103:
1102:
1096:
1089:
1087:
1083:
1082:
1080:
1079:
1074:
1068:
1061:
1059:
1055:
1054:
1052:
1051:
1045:
1042:Version 7 Unix
1039:
1036:Version 6 Unix
1032:
1030:
1024:
1023:
1014:
1012:
1011:
1004:
997:
989:
983:
982:
977:
971:
966:
960:
955:
953:V6 source code
948:
947:External links
945:
942:
941:
907:
855:
826:
794:
743:Ritchie, D. M.
739:Johnson, S. C.
727:
702:
677:
646:
619:
587:(4): 379–418.
570:
569:
567:
564:
563:
562:
555:
552:
533:Elektronika BK
475:
472:
455:
452:
434:
433:Interdata 8/32
431:
412:Interdata 7/32
403:
402:Interdata 7/32
400:
398:
395:
329:Main article:
306:and commentary
292:
289:
268:Version 5 Unix
258:Version 7 Unix
228:Version 6 Unix
226:, also called
219:
218:
216:Version 7 Unix
213:
209:
208:
206:Version 5 Unix
203:
199:
198:
181:
175:
174:
171:Thompson shell
164:
162:user interface
156:
155:
147:
143:
142:
137:
131:
130:
125:
121:
120:
107:
103:
102:
99:
95:
94:
91:
87:
86:
81:
77:
76:
67:
61:
60:
55:
49:
48:
33:
23:Version 6 Unix
18:
15:
13:
10:
9:
6:
4:
3:
2:
1885:
1874:
1873:1975 software
1871:
1869:
1866:
1864:
1863:Unix variants
1861:
1859:
1856:
1854:
1851:
1849:
1846:
1845:
1843:
1828:
1827:
1818:
1816:
1815:
1805:
1802:
1801:
1798:
1792:
1789:
1787:
1786:
1782:
1780:
1777:
1775:
1772:
1770:
1769:
1765:
1763:
1762:
1758:
1756:
1755:
1751:
1749:
1748:
1744:
1742:
1741:
1737:
1735:
1734:
1730:
1728:
1727:
1723:
1721:
1720:
1716:
1714:
1713:
1709:
1707:
1704:
1702:
1699:
1698:
1696:
1694:
1691:Compatibility
1688:
1678:
1675:
1673:
1672:
1668:
1666:
1663:
1661:
1660:
1659:Research Unix
1656:
1652:
1651:
1650:BlackBerry 10
1647:
1646:
1645:
1642:
1640:
1639:
1635:
1633:
1632:
1628:
1626:
1623:
1621:
1618:
1614:
1611:
1610:
1609:
1606:
1604:
1601:
1599:
1598:
1594:
1593:
1591:
1587:
1581:
1580:
1576:
1574:
1573:
1569:
1565:
1562:
1560:
1559:
1555:
1554:
1553:
1550:
1548:
1545:
1543:
1542:
1538:
1536:
1533:
1531:
1528:
1526:
1525:
1521:
1520:
1518:
1516:
1515:
1514:
1508:
1502:
1499:
1497:
1494:
1492:
1489:
1487:
1484:
1482:
1479:
1477:
1474:
1472:
1469:
1467:
1464:
1462:
1459:
1457:
1454:
1453:
1451:
1449:
1448:
1443:
1437:
1436:
1432:
1430:
1429:
1425:
1423:
1422:
1418:
1416:
1415:
1411:
1407:
1404:
1402:
1399:
1397:
1394:
1392:
1389:
1387:
1384:
1382:
1379:
1377:
1374:
1373:
1372:
1369:
1365:
1364:DragonFly BSD
1362:
1360:
1357:
1355:
1352:
1350:
1347:
1346:
1345:
1344:
1340:
1339:
1337:
1335:
1334:
1333:
1327:
1324:
1322:
1316:
1310:
1307:
1305:
1302:
1300:
1297:
1295:
1292:
1290:
1287:
1285:
1282:
1281:
1278:
1274:
1270:
1267:
1263:
1256:
1251:
1249:
1244:
1242:
1237:
1236:
1233:
1221:
1213:
1212:
1209:
1203:
1200:
1198:
1195:
1194:
1192:
1188:
1182:
1179:
1177:
1174:
1172:
1169:
1167:
1164:
1162:
1159:
1157:
1154:
1152:
1149:
1147:
1144:
1142:
1139:
1137:
1134:
1132:
1129:
1127:
1124:
1122:
1119:
1117:
1114:
1113:
1111:
1107:
1100:
1099:UNIX System V
1097:
1094:
1091:
1090:
1088:
1084:
1078:
1075:
1072:
1069:
1066:
1063:
1062:
1060:
1056:
1049:
1046:
1043:
1040:
1037:
1034:
1033:
1031:
1029:
1025:
1021:
1017:
1010:
1005:
1003:
998:
996:
991:
990:
987:
981:
978:
975:
972:
970:
967:
964:
961:
959:
956:
954:
951:
950:
946:
930:
926:
922:
918:
911:
908:
896:
892:
888:
884:
880:
876:
872:
871:
870:IEEE Spectrum
866:
859:
856:
850:
845:
841:
837:
830:
827:
812:
805:
798:
795:
779:
775:
771:
767:
763:
759:
755:
748:
744:
740:
734:
732:
728:
720:
713:
706:
703:
695:
688:
681:
678:
663:
656:
650:
647:
635:. p. 132
634:
630:
623:
620:
616:
612:
608:
604:
600:
595:
590:
586:
582:
575:
572:
565:
561:
558:
557:
553:
551:
549:
545:
540:
538:
534:
530:
526:
521:
519:
515:
511:
507:
504:
499:
497:
491:
489:
485:
481:
473:
471:
469:
465:
461:
460:Princeton, NJ
453:
451:
449:
445:
441:
432:
430:
428:
424:
421:
417:
413:
409:
401:
396:
394:
392:
388:
384:
383:free software
379:
377:
376:
370:
369:
364:
359:
357:
352:
350:
346:
342:
338:
332:
325:
322:, running on
321:
318:on Version 6
317:
312:
305:
301:
297:
290:
288:
286:
282:
278:
274:
269:
265:
261:
259:
255:
254:minicomputers
251:
248:
244:
240:
237:
233:
229:
225:
217:
214:
210:
207:
204:
200:
197:
193:
192:free software
189:
186:
182:
180:
176:
172:
168:
165:
163:
157:
154:
151:
148:
144:
141:
138:
136:
132:
129:
128:Minicomputers
126:
122:
109:May 1975
108:
104:
100:
96:
92:
90:Working state
88:
85:
82:
78:
75:
71:
68:
66:
62:
59:
56:
54:
50:
45:
41:
37:
31:
26:
1858:Unix history
1824:
1812:
1803:
1783:
1766:
1759:
1752:
1745:
1738:
1731:
1724:
1717:
1710:
1669:
1657:
1648:
1636:
1629:
1595:
1577:
1570:
1556:
1539:
1522:
1511:
1510:
1445:
1433:
1426:
1419:
1412:
1341:
1330:
1329:
1284:Architecture
1181:Ken Thompson
1035:
933:. Retrieved
924:
920:
910:
898:. Retrieved
874:
868:
858:
839:
829:
818:. Retrieved
797:
785:. Retrieved
757:
753:
705:
680:
669:. Retrieved
649:
637:. Retrieved
632:
622:
614:
584:
580:
574:
560:Ancient UNIX
541:
525:Eastern Bloc
522:
508:
500:
492:
490:hypervisor.
477:
457:
446:port to the
436:
405:
380:
373:
367:
360:
353:
334:
315:
262:
231:
227:
223:
222:
212:Succeeded by
135:Available in
98:Source model
1747:MKS Toolkit
1558:OpenSolaris
1166:Joe Ossanna
1151:John Mashey
397:Portability
387:BSD License
337:source code
316:/usr/source
304:source code
291:Source code
281:Whitesmiths
273:INTERACTIVE
202:Preceded by
196:BSD License
185:proprietary
183:Originally
101:Open source
1842:Categories
1768:PWS/VSE-AF
1665:SerenityOS
1572:Tru64 UNIX
1547:OpenServer
1299:Philosophy
1289:Filesystem
1141:David Korn
1086:Commercial
935:2023-07-29
900:August 25,
820:2016-07-20
671:2023-07-31
639:30 January
566:References
482:, and the
468:Amdahl UTS
454:IBM VM/370
363:John Lions
300:John Lions
252:family of
65:Written in
34:Version 6
1603:Domain/OS
1319:Operating
1266:Unix-like
1190:Companies
1146:Mike Lesk
1067:(c. 1975)
1020:Bell Labs
927:(3): 19.
881:: 34–55.
589:CiteSeerX
391:SCO Group
389:from the
365:' famous
266:licensed
243:Bell Labs
146:Platforms
80:OS family
53:Developer
1814:Category
1761:P.I.P.S.
1597:Coherent
1579:UnixWare
1513:System V
1466:ChromeOS
1421:NeXTSTEP
1406:bridgeOS
1304:Security
1220:Category
1171:Rob Pike
1126:Tom Duff
1071:PWB/UNIX
1058:Internal
1048:UNIX/32V
1028:Research
929:Archived
895:29893166
811:Archived
778:Archived
774:17510065
745:(1978).
719:Archived
694:Archived
662:Archived
554:See also
444:UNIX/32V
423:compiler
385:under a
375:samizdat
351:(UNSW).
347:and the
277:PWB/UNIX
230:or just
194:under a
93:Historic
74:assembly
38:for the
1826:Commons
1804:Italics
1733:MachTen
1726:Interix
1706:Darling
1677:more...
1564:Illumos
1552:Solaris
1486:Red Hat
1456:Android
1401:watchOS
1386:audioOS
1359:OpenBSD
1349:FreeBSD
1321:systems
1294:History
1065:CB UNIX
611:5700897
523:In the
179:License
160:Default
140:English
116:1975-05
114: (
1712:Eunice
1701:Cygwin
1693:layers
1620:LynxOS
1496:Ubuntu
1481:Gentoo
1476:Fedora
1471:Debian
1435:Ultrix
1391:iPadOS
1371:Darwin
1354:NetBSD
1343:386BSD
1109:People
1101:(1983)
1095:(1982)
1073:(1977)
1050:(1979)
1044:(1979)
1038:(1975)
893:
877:(12).
787:4 June
772:
609:
591:
537:BKUNIX
514:PDP-11
496:USENIX
480:LSI-11
464:VM/370
250:PDP-11
190:, now
153:PDP-11
40:PDP-11
1671:Xenix
1638:OSF/1
1625:Minix
1589:Other
1535:HP-UX
1447:Linux
1428:SunOS
1414:DYNIX
1376:macOS
1309:Shell
891:S2CID
814:(PDF)
807:(PDF)
781:(PDF)
770:S2CID
750:(PDF)
722:(PDF)
715:(PDF)
697:(PDF)
690:(PDF)
665:(PDF)
658:(PDF)
607:S2CID
285:Idris
1754:PASE
1613:Hurd
1541:IRIX
1524:A/UX
1491:SUSE
1461:Arch
1396:tvOS
1271:and
1264:and
1262:Unix
1016:Unix
902:2024
879:IEEE
789:2022
641:2015
633:BYTE
529:MNOS
518:IS/1
501:The
488:MERT
324:SIMH
320:Unix
236:Unix
84:Unix
44:SIMH
36:Unix
1719:GNV
1644:QNX
1631:MOS
1608:GNU
1530:AIX
1381:iOS
1332:BSD
1018:by
883:doi
844:doi
762:doi
599:doi
548:xv6
544:MIT
448:VAX
247:DEC
150:DEC
1844::
925:14
923:.
919:.
889:.
875:48
873:.
867:.
838:.
809:.
776:.
768:.
758:57
756:.
752:.
741:;
730:^
717:.
692:.
660:.
631:.
613:.
605:.
597:.
585:17
583:.
550:.
520:.
470:)
450:.
393:.
343:,
287:.
232:V6
72:,
1254:e
1247:t
1240:v
1008:e
1001:t
994:v
938:.
904:.
885::
852:.
846::
823:.
791:.
764::
674:.
643:.
601::
420:C
416:C
173:)
169:(
118:)
70:C
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
