110850 FC: A File Compression Utility Version: May 1986 Author: Ted Dustman, V.A. Medical Center, Salt Lake City, UT Submitted by: Robert Dustman, V.A. Medical Center, Salt Lake City, UT Operating System: RT-11 V4, TSX-PLUS V5 Source Language: C Memory Required: 18KB Keywords: File Management Abstract: FC is a program designed to compress and decompress text files. It is not another "squeeze" program; it actually reduces the size of text files from 35% to 50%. The compressed text file cannot be edited of course; its use is for archival purposes or for transmission to other computers via modem. The program is ineffective on small files (say one block long). It implements Huffman's variable length code algorithm for compressing text. The program is, unfortunately, somewhat slow. It takes about two minutes for it to compress a file 110 blocks long running on a PDP-11/23+ with RL02 disks. Decompression takes less time. Restrictions: Compresses only text files. Media (Service Charge Code): One RX01 Diskette (KA) Format: RT-11, 600' Magnetic Tape (MA) Format: RT-11