Aminet Amiga CDROM, March 1994.  Walnut Creek CDROM.
----------------------------------------------------
OS3.x only: datatypes
path: \Aminet\os30\dtype 
----------------------------------------------------
Name             Size    Date    Description
------------     ----    ----    -------------------
GIFDATAT.LHA    5,232  04-02-93  GIF datatype for OS 3.0 and up 
JPEGDATA.LHA   28,492  08-21-93  A JPEG datatype, 3.0+ and '020+ required 
TPD.LHA         6,471  01-31-94  Tron's PCX DataType V39.1 
ZGIFDATA.LHA    5,965  09-13-93  the FASTEST gif.datatype there is.