Definisi of accounting
accounting, is the production of information about an enterprise and the transmission of that information from people who have it to those who need it. The communication is generally in the form of financial statements that show in money terms the economic resources under the control of management; the art lies in selecting the information that is relevant to the user and is representationally faithful. The principles of accountancy are applied to business entities in three divisions of practical art, named accounting, bookkeeping, and auditing.
Information technology plays a vital role within accounting. Today many tedious accounting practices have been simplified with the help of computer software. Software such as enterprise resource planning (ERP) software systems help to manage value chain of companies. ERP systems provide a comprehensive, centralized, integrated source of information that companies can use to manage all major business processes, from purchasing to manufacturing to human resources. this software can replace up to 200 individual software programs that were previously used. there is also computer integrated manufacturing that allows products to be made and completely untouched by human hands and can increase production by having less errors in manufacturing process. Computers have reduced the cost of accumulating, storing, and reporting managerial accounting information and have made it possible to produce a more detailed account of all data that is entered into any given system. Computers have changed business to business interaction through e-commerce. rather than dealing with multiple companies to purchase products a business can purchase a product at a less expensive price and take out the third party and vastly reduces expenses companies once accrued. Inter-organizational information system enable suppliers and businesses to be connected at all times. When a company is low on a product the supplier will be notified and fulfill an order immediately which eliminates the need for someone to do inventory, fill out the proper documents, send them out and wait for their products. 
Early accounts served mainly to assist the memory of the businessperson and the audience for the account was the proprietor or record keeper alone. Cruder forms of accounting were inadequate for the problems created by a business entity involving multiple investors, so double-entry bookkeeping first emerged in northern Italy in the 14th century, where trading ventures began to require more capital than a single individual was able to invest. The development of joint-stock companies created wider audiences for accounts, as investors without firsthand knowledge of their operations relied on accounts to provide the requisite information. This development resulted in a split of accounting systems for internal (i.e. management accounting) and external (i.e. financial accounting) purposes, and subsequently also in accounting and disclosure regulations and a growing need for independent attestation of external accounts by auditors.
Today, accounting is called "the language of business" because it is the vehicle for reporting financial information about a business entity to many different groups of people. Accounting that concentrates on reporting to people inside the business entity is called management accounting and is used to provide information to employees, managers, owner-managers and auditors. Management accounting is concerned primarily with providing a basis for making management or operating decisions. Accounting that provides information to people outside the business entity is called financial accounting and provides information to present and potential shareholders, creditors such as banks or vendors, financial analysts, economists, and government agencies. Because these users have different needs, the presentation of financial accounts is very structured and subject to many more rules than management accounting. The body of rules that governs financial accounting in a given jurisdiction is called Generally Accepted Accounting Principles, or GAAP. Other rules include International Financial Reporting Standards, or IFRS, or US GAAP.
Main articles: Luca Pacioli and Double-entry bookkeeping system
When medieval Europe moved to a monetary economy in the 13th century, sedentary merchants depended on bookkeeping to oversee multiple simultaneous transactions financed by bank loans. One important breakthrough took place around that time: the introduction of double-entry bookkeeping, which is defined as any bookkeeping system in which there was a debit and credit entry for each transaction, or for which the majority of transactions were intended to be of this form. The historical origin of the use of the words 'debit' and 'credit' in accounting goes back to the days of single-entry bookkeeping in which the chief objective was to keep track of amounts owed by customers (debtors) and amounts owed to creditors. 'Debit,' is Latin for 'he owes' and 'credit' Latin for 'he trusts'.
The earliest extant evidence of full double-entry bookkeeping is the Farolfi ledger of 1299-1300. Giovanno Farolfi & Company were a firm of Florentine merchants whose head office was in Nîmes who also acted as moneylenders to the Archbishop of Arles, their most important customer. The oldest discovered record of a complete double-entry system is the Messari (Italian: Treasurer's) accounts of the city of Genoa in 1340. The Messari accounts contain debits and credits journalised in a bilateral form, and contain balances carried forward from the preceding year, and therefore enjoy general recognition as a double-entry system.
Luca Pacioli's "Summa de Arithmetica, Geometria, Proportioni et Proportionalità" (early Italian: "Review of Arithmetic, Geometry, Ratio and Proportion") was first printed and published in Venice in 1494. It included a 27-page treatise on bookkeeping, "Particularis de Computis et Scripturis" (Latin: "Details of Calculation and Recording"). It was written primarily for, and sold mainly to, merchants who used the book as a reference text, as a source of pleasure from the mathematical puzzles it contained, and to aid the education of their sons. It represents the first known printed treatise on bookkeeping; and it is widely believed to be the forerunner of modern bookkeeping practice. In Summa Arithmetica, Pacioli introduced symbols for plus and minus for the first time in a printed book, symbols that became standard notation in Italian Renaissance mathematics. Summa Arithmetica was also the first known book printed in Italy to contain algebra.
Although Luca Pacioli did not invent double-entry bookkeeping, his 27-page treatise on bookkeeping contained the first known published work on that topic, and is said to have laid the foundation for double-entry bookkeeping as it is practiced today. Even though Pacioli's treatise exhibits almost no originality, it is generally considered as an important work, mainly because of its wide circulation, it was written in the vernacular Italian language, and it was a printed book.According to Pacioli, accounting is an ad hoc ordering system devised by the merchant. Its regular use provides the merchant with continued information about his business, and allows him to evaluate how things are going and to act accordingly. Pacioli recommends the Venetian method of double-entry bookkeeping above all others. Three major books of account are at the direct basis of this system: the memoriale (Italian: memorandum), the giornale (Journal), and the quaderno (ledger). The ledger is considered as the central one and is accompanied by an alphabetical index.