Name Control The first 4 letters of the taxpayer’s last name (in the case of individuals) and the first 4…
Microfilm Serial Number This is a 10–digit number assigned to FTD’s during the OCR scanning process. This has increased to…
Microfilm Replacement System (MRS) The Microfilm Replacement System (MRS) is a realtime mode that supports a myriad of functions. It…
Master File Tax Code (MFT) The MFT reduces the numerous types of tax to a two digit code
Master File (MF) A magnetic tape record containing all information regarding the taxpayer’s filing of returns and related documents.
Master Control Record (MCR) This is basically the DLN and ABC identifier along with other block header information of a…
Magnetic Tape (Mag Tape) Magnetic tapes are made of flexible plastic with only one side coated with a magnetic recording…
Machine language The language at its lowest level in binary form (001111100), into which data and programs must ultimately be…