INFO-ZIP, TOOLS, V5.12 of Info-ZIP file compression/decompression tools Zip is a utility to compress multiple files into a single .ZIP archive. The images and sources are located in zip20.zip. Use the UNZIP images located in this directory to obtain these images and sources. UnZip is an extraction utility for archives compressed in .zip format (also called "zipfiles"). Although highly compatible both with PKWARE's PKZIP and PKUNZIP utilities for MS-DOS and with Info-ZIP's own Zip program, our primary objectives have been portability and non-MSDOS functionality.