"Symantec ProComm Plus 4.8.zip" refers to a compressed archive that likely contains version 4.8 of ProComm Plus, a terminal emulation, modem communications, and BBS/file-transfer client originally published by Symantec (which acquired the product line). ProComm and ProComm Plus were widely used in the late 1980s and 1990s for dial-up communications, serial terminal sessions, file transfers (ZMODEM/XMODEM/YMODEM), scripting/automation, and BBS access. Version 4.8 is one of the late MS-DOS-era releases; an archive named "Symantec ProComm Plus 4.8.zip" would typically contain executable files, documentation, configuration files, drivers for serial ports/modems, and possibly installation scripts or copy-protection files.