213F INT 21 - DOS 2+ - "READ" - READ FROM FILE OR DEVICE
213F INT 21 - Turbo Debug HARDWARE BREAKPOINTS - READ STATUS BLOCK
213F INT 21 - PC/TCP IPCUST.SYS - READ CONFIGURATION DATA
213F INT 21 - WORKGRP.SYS - GET ENTRY POINT
213F INT 21 - BW-TCP - GET DRIVER INFO
213F INT 21 - Trusted Access - NB.SYS - GET STATE
213F INT 21 U - IFSHLP.SYS - GET ENTRY POINT
213F--BXFEB0 INT 21 - VIRUS - "KYZ/LieWait" - INSTALLATION CHECK