Name Control

Name Control The first 4 letters of the taxpayer’s last name (in the case of individuals) and the first 4 letters of the business name (in the case of partnership, corporations etc.). The name control is used to check master file and assure that the TIN corresponds with the proper taxpayer.

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Modem

Modem A device for converting signals to be transferred over telephone lines.

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Microfilm Serial Number

Microfilm Serial Number This is a 10–digit number assigned to FTD’s during the OCR scanning process. This has increased to a 12 digit number during SCRIPS processing.

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Microfilm Replacement System (MRS)

Microfilm Replacement System (MRS) The Microfilm Replacement System (MRS) is a realtime mode that supports a myriad of functions. It is accessed through, and provides direct retrieval of master file data, via IDRS realtime and DIS or Zilog input. This automated system replaced most microfilm research of tax data in the service center district office.… Continue reading Microfilm Replacement System (MRS)

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Master File (MF)

Master File (MF) A magnetic tape record containing all information regarding the taxpayer’s filing of returns and related documents.

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Master Control Record (MCR)

Master Control Record (MCR) This is basically the DLN and ABC identifier along with other block header information of a given block. This data is gathered through input from DIS, OCR, RPS and IDRS to create the block on the SCCF. This allows for identification of a block of work from its inception. If the… Continue reading Master Control Record (MCR)

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Mainframe

Mainframe Mainframe means large computer. Mainframes have faster processing speeds than smaller systems. The mainframe also houses the CPU.

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Magnetic Tape (Mag Tape)

Magnetic Tape (Mag Tape) Magnetic tapes are made of flexible plastic with only one side coated with a magnetic recording material. Tapes come in reels, cartridges, or cassettes of all sizes — just like audio tapes. Information is usually recorded on tape in parallel tracks that run the entire length of the tape. Tapes are… Continue reading Magnetic Tape (Mag Tape)

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Machine language

Machine language The language at its lowest level in binary form (001111100), into which data and programs must ultimately be translated before the machine can use it and execute any instructions.

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