.$$S File Extension Details

What program uses .$$S file extension?

Program : OS/2 Spreadsheet
Program Website: OS/2 Spreadsheet
Company : IBM
Company Website: IBM

Extensions starting with

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | #-0-9