On UNIX, the progression of the most widespread data compression programs was as follows:
- (AFAIR: Pre System V) compact (suffix .C), dynamic Huffman coding
- (AFAIR: introduced in System V) pack (suffix .z), static Huffman coding (could not work with streamed data)
- (AFAIR: appeared in a BSD distribution) compress (suffix .Z), Lempel–Ziv–Welch algorithm
- (appeared everywhere) gzip, DEFLATE algorithm from PKZIP
- ... and the rest is modern history
What is the story of data compression tools - with or without archiving capabilities - on personal computers, before System Enhancement Associates and PKWARE, Inc. programs appeared in 1985/1986?
Update: Ignoring as trivial those that were only capable of run-length encoding.