.B System V release 2 (SVr2)
This was the next System V release, made in 1985.
The SVr2 was formally described in the
-.I "System V Interface Definition version 1"
+.I "System V Interface Definition Issue 1"
.RI ( "SVID 1" )
published in 1985.
.TP
.B System V release 3 (SVr3)
This was the successor to SVr2, released in 1986.
This release was formally described in the
-.I "System V Interface Definition version 2"
-.RI ( "SVID 2" ).
+.UR https:\://bitsavers.org/\:pdf/\:att/\:unix/\:SVID/\:System_V_Interface_Definition_Issue_2_Volume_1_1986.pdf
+.I "System V Interface Definition Issue 2"
+.RI ( "SVID 2" )
+.UE .
.TP
.B System V release 4 (SVr4)
This was the successor to SVr3, released in 1989.
Manual: Operating System API (Intel processors)" (Prentice-Hall
1992, ISBN 0-13-951294-2)
This release was formally described in the
-.I "System V Interface Definition version 3"
-.RI ( "SVID 3" ),
+.UR https:\://archive.org/\:details/\:systemvinterface0001unse/
+.I "System V Interface Definition Third Edition"
+.RI ( "SVID 3" )
+.UE ,
and is considered the definitive System V release.
.TP
.B SVID 4