Optical proximity correction
Ordinary Portland cement
Organic Photo Conductor, an element used for, among other applications, photocopier and laser printer drums.
Open Packaging Conventions, a container-file technology created by Microsoft to store a combination of XML and non-XML files
Open Platform Communications (OPC, which formerly stood for 'OLE for Process Control'), in MPDV
OPC Foundation, a related consortium
Operations Planning and Control, renamed to IBM Tivoli Workload Scheduler (TWS) ...
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