2507 Z Compressed Data Aggregate Z Compressed Data are files that have been compressed by Unix's shell compression program, compress. The compress software was developed by Spencer Thomas in 1984 and uses LZW algorithm. The format has lossless data, it can be compressed and decompressed using the Unix and Linux operating systems. 180 The National Archives and Records Administration / The National Archives and Records Administration 22 Apr 2022 04/2024 (v.118)- Name of developer corrected in description. Submitted by Igor Nechaev. 15 Apr 2024 fmt/1671 PUID z File extension 2005 Z Compressed Data BOF; Offset: 0; Magic Bytes: 0x1F9D90 1 Absolute from BOF 0 0 1F9D90