File Manager
windows explorer
File management is the utility that keeps track of where your documents, spreadsheets, and presentation are located. It also displays other files that are on your computer like pictures.
-Memory Management -Process Management -Disk and File System Management -Networking -Security -Graphical User Interface (GUI) -Device Driver Management
Program Manager
I think answer is File Compression
WinZip
DOS has three primary components, the resident disk handier, the File Management System (FMS), and the Disk Utility Package (DUP).
File compression
functions of utility program is to perform specific tasks related to the management of computer functions,resources or files as password protection,memory management,virus protection and file compressionThis utility reads all V3 MMS output files, print out the header, partial sub-header and a value from all fields in the dataset.
WinZip
File Compression