3951 ACE 2 Aggregate ACE is a compressed archive format, originally developed by Marcel Lemke and later by e-merge GmbH. Some relevant software includes Ace (for DOS, OS/2 and Windows console, WinAce, Active ACE and ACE Compression. Version 2 of ACE introduced new compression schemes that are not supported by all ACE compression software. 299 Brigham Young University / Brigham Young University 27 Nov 2025 27 Nov 2025 application/x-ace-compressed MIME fmt/2076 PUID ace File extension 3439 ACE Archive 2 BOF; Offset: 7; Magic Bytes: '**ACE**' followed by byte sequence of 0x1414 1 Absolute from BOF 7 0 2A2A4143452A2A1414