This writing has the intention to show as they have been the main authors of the UNIX operating system to way of comparative picture.
Table1:Main Authors of the UNIX operating system. Name Ken Thompson Education, Experience B.Sc., M.Sc. EE, Berkeley 65, 66; BL 66B.A. Physics, Harvard 63;Ph.D. Appl. Math, Harvard 68 (diss on subrecursivehierarchies of functions);BL 68Contributions to Unix B, bas, Fortran (with Ritchie), ed, roff, sort, grep, uniq, plot, sa, dd C, fork-exec, setuserid, db, ed, I/O stream in v8; (with Thompson) fc(fortran iv); (with Johnson), port to Interdata n/troff typo, math library, primes, factor, crypt (with Cherry) dcbc tmg, speak, diff, join, look. dict, spell eqn (startup), parts
Unix(officially trademarked as UNIX, sometimes also written as Unix with small caps) is a computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including KenThompson, Dennis Ritchie, Brian Kernighan, Douglas McIlroy, and Joe Ossanna. Today's UNIX systems are split into various branches, developed over time by AT&T as well as various commercial vendors andnonprofit organizations. The Open Group, an industry standards consortium, owns the “Unix” trademark. Only systems fully compliant with and certified according to the Single UNIX Specification arequalified to use the trademark; others may be called "Unix system-like" or "Unix-like" (though the Open Group disapproves of this term). However, the term "Unix" is often used informally to denote anyoperating system that closely resembles the trademarked system. During the late 1970s and early 1980s, the influence of Unix in academic circles led to large-scale adoption of Unix (particularly of the BSDvariant, originating from the University of California, Berkeley) by commercial startups, the most notable of which are Solaris, HP-UX and AIX. Today, in addition to certified Unix systems such as...