This release of the dual-polynomial Z-System CRC checker introduces sorting of the file list for a neater, more readable display and includes a new Type 4 executable. ZCRCK reports both the CRCK (Keith Petersen's hash code checksum) and CHEK (the CCITT 16-bit CRC standard) values to CON: and optionally to LST: and/or the disk file "CRC.CRC."