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Definition: StuffIt


A data and image compression program for Windows and Mac from Smith Micro Software Inc., Aliso Viejo, CA. Originally developed in 1987 by Raymond Lau at age 16, StuffIt was the de facto compression utility for the Mac, superseding PackIt. StuffIt creates .SIT and .SITX archives, the latter providing special compression algorithms based on the type of data being compressed. StuffIt compression programs are commercial packages for compressing and decompressing, while the StuffIt Expander decompressor is free. Smith Micro acquired StuffIt in 2005 as part of its purchase of Allume Systems (formerly Aladdin Systems).