From terminal hardware to debugging tools, this text provides a working manual on CICS internals. This practical reference and guide, is aimed at COBOL programmers and systems, and applications programmers operating in a mainframe environment who work with CICS internals. Covering the latest releases of CICS, CICS/MVS for MVS/XA and CICS/ESA for MVS/ESA, this comprehensive, hands-on book provides readers with a sound working knowledge of the concepts, programs, methods, techniques, systems, designs, and commands needed to achieve optimum operating efficiency. Over 1,000 sample questions and answers treat all key areas including storage allocation; task management; program control; access to terminals and files; terminal hardware and mapping programs; VSAM tips and database methods; using a common system dump area; debugging aids; application design; master terminal commands; temporary scratchpad storage; and conveying transient data.