An accounting machine, or bookkeeping machine or recording-adder, was generally a calculator and printer combination tailored for a specific commercial activity such as billing, payroll, or ledger. Accounting machines were widespread from the early 1900s to 1980s, but were rendered obsolete by the availability of low-cost computers such as the IBM PC

IBM PC

The IBM Personal Computer, commonly known as the IBM PC, is the original version and progenitor of the IBM PC compatible hardware platform. It is IBM model number 5150, and was introduced on August 12, 1981...

.

This type of machine is generally distinct from unit record equipment

Unit record equipment

Before the advent of electronic computers, data processing was performed using electromechanical devices called unit record equipment, electric accounting machines or tabulating machines. Unit record machines were as ubiquitous in industry and government in the first half of the twentieth century...

 (some unit record machines were also called accounting machines).

List of Vendors/Accounting Machines

• Burroughs Sensimatic
• Burroughs Sensitronic
• Burroughs B80
• Burroughs E103
• Burroughs Computer F2000
• Burroughs L500
• Burroughs E1400 Electronic Computing/Accounting Machine with Magnetic Striped Ledger
• Dalton Adding Machine Company
• Electronics Corporation of America: Magnefile-B
• Electronics Corporation of America: Magnefile-D
• Elliott-Fisher
• Federal Adding Machines
• IBM 632
  IBM 632
  The IBM 632 was a valve-and-relay driven basic accounting machine, introduced in 1958, that was available in seven different models. It consisted of an IBM Electric typewriter and at least a punched card unit that housed the "electronics" in two gates . Some machines also had a card reader unit...
  
  
• IBM 858 Cardatype Accounting Machine
• IBM 6400 Series
• Laboratory for Electronics: The Inventory Machine II (TIM-II)
• Monroe Calculator Company: Model 200
  Monroe Calculator Company
  The Monroe Calculator Company was a leading maker of adding machines and calculators founded in 1912 by Jay R. Monroe and now known as Monroe Systems for Business...
  
  
• Monroe Calculator Company
  Monroe Calculator Company
  The Monroe Calculator Company was a leading maker of adding machines and calculators founded in 1912 by Jay R. Monroe and now known as Monroe Systems for Business...
  
  : Synchro-Monroe President
• Monroe Calculator Company
  Monroe Calculator Company
  The Monroe Calculator Company was a leading maker of adding machines and calculators founded in 1912 by Jay R. Monroe and now known as Monroe Systems for Business...
  
  : Monrobot IX
• NCR Post-Tronic Bookkeeping Machine - Class 29
• NCR
  NCR Corporation
  NCR Corporation is an American technology company specializing in kiosk products for the retail, financial, travel, healthcare, food service, entertainment, gaming and public sector industries. Its main products are self-service kiosks, point-of-sale terminals, automated teller machines, check...
  
   Compu-Tronic Accounting Machine
• NCR
  NCR Corporation
  NCR Corporation is an American technology company specializing in kiosk products for the retail, financial, travel, healthcare, food service, entertainment, gaming and public sector industries. Its main products are self-service kiosks, point-of-sale terminals, automated teller machines, check...
  
   Accounting Machine - Class 33
• NCR
  NCR Corporation
  NCR Corporation is an American technology company specializing in kiosk products for the retail, financial, travel, healthcare, food service, entertainment, gaming and public sector industries. Its main products are self-service kiosks, point-of-sale terminals, automated teller machines, check...
  
   Window Posting Machine - Class 42
• Olivetti
  Olivetti
  Olivetti S.p.A. is an Italian manufacturer of computers, printers and other business machines.- Founding :The company was founded as a typewriter manufacturer in 1908 in Ivrea, near Turin, by Camillo Olivetti. The firm was mainly developed by his son Adriano Olivetti...
  
  : General Bookkeeping Machine (GBM)
• J. B. Rea Company: READIX
• Sundstrand Adding Machines
• Underwood Elecom 50 "The First Electronic Accounting Machine"
• Underwood Elecom 125, 125 FP (File Processor)