The first major IOCS was developed for
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IOCS was intended to allow Assembler language programmers to read and write records without having to worry about the details of the various devices or the blocking of logical records into physical records. IOCS provided the run time I/O support for several compilers.
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Answer: IBM(INTERNATIONAL BUSINESS MACHINES)
Explanation: Input/Output Control System (IOCS) is any of several packages on early IBM entry-level and mainframe computers that provided low level access to records on peripheral equipment. IOCS provides functionality similar to File Control Processor (FCP)[1] in RCA 3301 Realcom Operating System, GEFRC[2] in GECOS and Record Management Services[3] (RMS) in DEC VAX/VMS.
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