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The IBM PC Local Area Network Program (1.00 is just named "IBM PC Network Program") is an IBM rebadged version of Microsoft's MS-NET (later Lan Manager). It is a program that lets any workstation on a network share resources, such as drives or printers, with other workstations.
PC-File is a simple flat file database management program for DOS. PC-File, along with PC-Write, and PC-Talk were the first popular products sold under the "Shareware" concept.