SCRIPT, any of a series of text markup languages starting with Script under Control Program-67/Cambridge Monitor System (CP-67/CMS) and Script/370 under Virtual Machine Facility/370 (VM/370); the current version, SCRIPT/VS, is part of IBM's Document Composition Facility (DCF) for IBM z/VM and z/OS systems. SCRIPT was developed for CP-67/CMS by Stuart Madnick at MIT, succeeding CTSS RUNOFF. SCRIPT is a procedural markup language. Inline commands called control words, indicated by a period in the first column of a logical line, describe the desired appearance of the formatted text. SCRIPT originally provided a 2PASS option to allow text to refer to variables defined later in the text, but subsequent versions allowed more than two passes.