Who invented double-entry bookkeeping?

No one person. Merchants in Italian trading cities used double entry before anyone wrote it down; it had been in use in Venice for about two centuries before Pacioli described it in 1494.

Who invented accounting, and how old is it?

No one invented it. Some of the oldest surviving writing is accounting: clay tablets from Mesopotamia, from about 3100 BC, record grain and other goods. Archaeologist Denise Schmandt-Besserat argues that clay tokens used as counters from about 7500 BC came first. See Gallery I.

When did accounting software start?

Companies used computers for accounting work from the early 1950s: LEO I began valuing a British bakery chain's output in 1951 and ran its payroll from 1954. Spreadsheets reached personal computers with VisiCalc in 1979, small-business bookkeeping software with products such as QuickBooks in 1992, and web-based accounting with NetLedger in 1998 and Xero in 2006.

How is AI used in accounting today?

AI tools read invoices and receipts, suggest how transactions should be coded, match records during the close, and draft commentary for review. The directory lists them with what each vendor says about SOC 2, training on customer data and human review; AI in accounting explains the uses task by task.

An exhibition in 7 galleries

History of Accounting

From clay counters to software that suggests journal entries, an exhibition of the tools people have used to keep accounts. Each label says what the object was and links to the museum or archive that holds or documents it.

Span: c. 7500 BC – today
Objects: 13
Admission: Free

Untitled (Debit, Credit), 2026. Ink on paper, drawn for this exhibit. The amounts are years from the galleries; the balance carried down makes the two sides agree.

Gallery I

Clay and cord

c. 7500 BC to the 1530s

Some of the oldest writing that survives is accounting. In Mesopotamia, early clay tablets mostly count goods: grain received, grain handed out. In the Andes, the Inca kept their accounts in knotted string. Neither needed paper, and both needed trained record keepers.

Plate 1

Clay tokens and envelope

From c. 7500 BC, Ancient Near East

Clay counters, later sealed inside clay envelopes

Archaeologist Denise Schmandt-Besserat argues that small clay tokens were used as counters for goods from about 7500 BC, and that envelopes of tokens gave way to tablets about 3200 BC. The theory is influential but debated, especially the idea that token shapes became written signs.

Theory documented by Denise Schmandt-Besserat, University of Texas at Austin.

Plate 2

Account of barley and emmer

c. 3100–2900 BC, Mesopotamia, probably Uruk (modern Warka, Iraq)

Clay tablet with proto-cuneiform signs

The tablet most likely records deliveries and distributions of grain. Its pictographic signs are proto-cuneiform; the round impressions beside them are numbers. The Met notes that early writing was used mainly to record and store economic information.

Collection of The Metropolitan Museum of Art, New York (1988.433.2).

Plate 3

Khipu

c. 1430–1530, Pacasmayo Valley, northern Peru; Inca

Knotted cotton cords

Khipus held information in the number, position and colour of knots and cords, using a decimal system. Trained officials used them to track censuses and the tribute owed by towns and provinces. The Inca did not invent the khipu; earlier Andean cultures such as Wari and Tiwanaku used them.

Collection of The British Museum, London (Am1907,0319.286).

Gallery II

Double entry

Venice, 1494

Every debit has a credit. Venetian merchants kept their books this way long before Luca Pacioli described the method. What changed in 1494 was print: the rules of double entry appeared in a published book for the first time.

Plate 4

Luca Pacioli

Summa de arithmetica, geometria, proportioni et proportionalita

1494, Venice, printed by Paganino de Paganini

Printed book; the bookkeeping section is titled Particularis de computis et scripturis

A compendium of the mathematics of its day, written partly for merchants. Its short bookkeeping section gives the first published description of double-entry bookkeeping: how to keep ledgers and balance debits against credits. Pacioli did not invent the method; it had been used in Venice for about two centuries.

A 1494 copy is held by Smithsonian Libraries and Archives (Dibner Library).

Gallery III

Machines that add

1642 to the 1890s

Arithmetic is most of bookkeeping, and for centuries inventors tried to hand it to machines. A teenager in Rouen built one for his father's tax work. In the 1880s two Americans designed machines that offices went on to buy: one added as fast as keys were pressed, the other printed each figure it added.

Plate 5

Blaise Pascal

Arithmetic machine (Pascaline)

Designed 1642; this example 1652, Designed in Rouen, France

Calculating machine for sums of money, with wheels for sols and deniers

Pascal, then 19, designed the machine to ease the work of his father, a tax commissioner in Normandy. This money-counting version has wheels with 20 teeth for sols and 12 for deniers, matching the French currency of the day. About ten examples survive. It was not the first mechanical calculator: Wilhelm Schickard's machine of 1623 came earlier.

Collection of the Musée des Arts et Métiers, Paris.

Plate 6

Dorr E. Felt

Comptometer

1886, Chicago

Key-driven adding machine in a wooden case, eight columns of nine keys

Felt, a Chicago machinist, set out to design a better adding machine for accountants. The Comptometer added each figure as its keys were pressed. This example is one of the first eight he built for customers; his patents were granted in 1887.

Collection of the Smithsonian National Museum of American History, Washington, D.C..

Plate 7

William S. Burroughs, American Arithmometer Company

Registering Accountant

Patented 1888; sold from the mid-1890s, St. Louis, Missouri

Full-keyboard adding machine that prints each entry on paper

Burroughs, a former clerk, formed the American Arithmometer Company in 1886 to build an adding machine that printed the figures entered, leaving a paper record. His patents date from 21 August 1888. By the mid-1890s the company was selling the Burroughs Registering Accountant, and in 1905 it became the Burroughs Adding Machine Company.

Documented by the Smithsonian National Museum of American History.

Gallery IV

The electronic office

London, 1951

The computer that the LEO Computers Society calls the first to run a regular office job belonged to a British chain of tea shops. Its first routine task was to value what the company's bakeries produced. Payroll followed.

Plate 8

J. Lyons & Co.

LEO I (Lyons Electronic Office)

1951, Cadby Hall, London

Stored-program electronic computer, based on Cambridge University's EDSAC

Lyons, the British tea shop and catering company, built LEO I between 1949 and 1951. Its first regular job, Bakery Valuations, worked out the value of goods made in Lyons' bakeries and went live in November 1951. In February 1954 it took over the bakeries' payroll.

Documented by the LEO Computers Society.

Gallery V

The spreadsheet

1979 to 1987

Columns and rows were always the shape of a ledger. In 1979 the grid became software you could buy for a personal computer: change one figure, and the totals recalculate.

Plate 9

Dan Bricklin and Bob Frankston, Software Arts

VisiCalc

1979, Massachusetts; published by Personal Software

Spreadsheet program for the Apple II, on floppy disk

Bricklin built a prototype in spring 1978 while studying for an MBA at Harvard, then founded Software Arts with Frankston to develop it. The Computer History Museum calls it the first spreadsheet for personal computers and the "killer app" that spurred Apple II sales.

Collection of the Computer History Museum, Mountain View, California.

Plate 10

Microsoft

Microsoft Excel

1985, Released for the Apple Macintosh

Spreadsheet program

Excel first shipped for the Macintosh in 1985, replacing Microsoft's earlier Multiplan on that computer. Museums Victoria notes it had a significant effect on sales of the Macintosh to businesses. A version for Windows followed in 1987.

A 1988 edition is in the collection of Museums Victoria, Melbourne.

Gallery VI

The books go online

1992 to 2006

Software then took on the books themselves: first on the desktop, built for business owners rather than accountants, and then over the internet, with the ledger kept on the vendor's servers instead of the customer's computer.

Plate 11

Intuit

QuickBooks

1992, California

Bookkeeping software for small businesses

Intuit, founded in 1983 by Scott Cook and Tom Proulx, began with Quicken for personal finances. Cook later recalled that customers wanted business bookkeeping without formal accounting: "We launched that product in 1992. It was called QuickBooks."

Recounted in Scott Cook's oral history at Harvard Business School, Baker Library (2001).

Plate 12

Evan Goldberg

NetLedger, later NetSuite

1998, San Mateo, California

Business accounting software delivered over the web

Goldberg started NetLedger, a name that refers to accounting ledgers, to deliver business software over the internet instead of installing it on each computer. It became NetSuite in 2002 as it added other applications, and Oracle agreed to buy it in 2016.

Company history from Oracle NetSuite.

Plate 13

Rod Drury and Hamish Edwards

Xero

2006, Wellington, New Zealand

Online accounting system for small businesses

Xero was established in July 2006 by Drury, a technology entrepreneur, and Edwards, who owned a small-business accounting practice. It sold an online accounting system for small and medium-sized businesses and listed on the New Zealand stock exchange in 2007.

From the company's 2007 listing announcement (NZX).

Gallery VII

The present collection

Today

The newest tools read invoices, suggest journal entries and draft the commentary. Not all of them say how they use the data you give them. This last room is the directory itself: each fact linked to the vendor's own pages, and marked unconfirmed wherever a vendor doesn't say. On display now: 72 tools.

Suggested, Reviewed, Unconfirmed, 2026. Ink on paper, drawn for this exhibit. Entries suggested by software are outlined in gold, entries checked by a reviewer are ticked in red, and one is marked unconfirmed.

72AI tools for accounting on display, each fact linked to the vendor’s own pages
47%don’t say whether customer data trains their AI
61%describe a person reviewing AI output before it posts

Enter the collection See the statistics

Questions about the history of accounting

Who is the father of accounting?: Luca Pacioli is usually given the title. His Summa de arithmetica, printed in Venice in 1494, contains the first published description of double-entry bookkeeping. He did not invent the method: Venetian merchants had used it for about two centuries. See Gallery II (opens in a new tab).
Who invented double-entry bookkeeping?: No one person. Merchants in Italian trading cities used double entry before anyone wrote it down; it had been in use in Venice for about two centuries before Pacioli described it in 1494.
Who invented accounting, and how old is it?: No one invented it. Some of the oldest surviving writing is accounting: clay tablets from Mesopotamia, from about 3100 BC, record grain and other goods. Archaeologist Denise Schmandt-Besserat argues that clay tokens used as counters from about 7500 BC came first. See Gallery I (opens in a new tab).
When did accounting software start?: Companies used computers for accounting work from the early 1950s: LEO I began valuing a British bakery chain's output in 1951 and ran its payroll from 1954. Spreadsheets reached personal computers with VisiCalc in 1979, small-business bookkeeping software with products such as QuickBooks in 1992, and web-based accounting with NetLedger in 1998 and Xero in 2006.
How is AI used in accounting today?: AI tools read invoices and receipts, suggest how transactions should be coded, match records during the close, and draft commentary for review. The directory lists them with what each vendor says about SOC 2, training on customer data and human review; AI in accounting explains the uses task by task.

Sources

Read on October 15, 2026. The drawings are original illustrations of each kind of object, not pictures of the examples linked.

Cite this page

AI Accounting Vendors. "History of Accounting." Updated October 15, 2026. https://aiaccountingvendors.com/history-of-accounting