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HJG Mainframe Consulting
ibm, host, mainframe, system programming, Systemprogrammierung, software, consulting, Beratung, Düsseldorf, Köln, NRW, z/os, os/390, MVS, DB/DC, IMS, DL/I, VSAM, DB2, CICS, SNA, VTAM, APPC, Assembler, PL/I, REXX, C, html, java, php, perl, vba>
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