AS4 file extension - IBM AS/400 client access file
What is as4 file? How to open as4 files?
File type specification:
The AS4 file extension is mainly related to AS/400 by an older generation of mid-range computer systems for IBM. The platform was first introduced as AS/400 in 1987 and later renamed as the eServer iSeries in 2000. As part of IBM's Systems branding initiative in 2006, it was again renamed to System i. These *.as4 files were used for store client access data.