COMPUTE! The Journal for Progressive Computing  ISSN 0194-357X

COMPUTE! began publishing in Nov/Dec 1979 (when it was called COMPUTE.).  It was started after acquiring The PET Gazette in 1979, and absorbing Pet User Notes and 6502 User Notes.  It acquired Recreational Computing in November 1981 and Home and Educational Computing (formerly PCC Newspaper) in March 1982.  COMPUTE!'s Gazette was spun off as a separate magazine in July 1983, with exclusively VIC-20 and 64 material, and COMPUTE!'s PC was spun off in 1987 with IBM coverage and an included floppy disk.  In January or February 1984, COMPUTE! added PC coverage, and in May 1988, COMPUTE! changed its focus to PC clones and stopped publishing type-in programs.

COMPUTE! was bought by Ziff-Davis, then General Media, changed its name to COMPUTE. It took three months in 1990 (Jul, Aug & Sep) for the re-organization to take 
place and subscribers were sent issues of OMNI magazine.  The August 1990 issue
 of Omni has 20 page special section (pages 75-94) with details of the new magazine 'Compute' which will start in Oct 1990.

All previous magazines  were combined into Compute.  In Oct. 1990 upon the relaunch, initially two versions of Compute! were printed (Amiga Resource Edition (which lasted for 6 issues), and the Gazette Edition (that section lasted until Dec 1993 when it went entirely disk based).
  
Compute ceased publishing in September 1994 with Vol. 16, No. 9 (Issue 168).