
PASC is an abbreviation for Precision Adaptive Sub-band Coding, and is a digital audio encoding method effectively the same as MPEG layer 1 and was used in Philips now defunct Digital Compact Cassette system. PASC divides the digital signal into equally spaced sub-bands and compresses the data to about 1/4th of the original size)
Found on
http://www.probertencyclopaedia.com/browse/GP.HTM

acronym: Polar Atmospheric and Snow Chemistry (IGAC)
Found on
https://www.encyclo.co.uk/local/20002
No exact match found.