The Computer as a Tool for Accounting

A computer is an electronic machine that takes in data, processes it according to a set of stored instructions, and gives out results that a person can use. For a Gujarat board Std 11 Accountancy student, the computer is not a separate subject to be memorised in isolation — it is simply the instrument that today's businesses use to carry out the same recording, classifying and summarising work that this book has been teaching by hand.

A computer system used in an accounting department is made up of four broad building blocks:

• Input devices — the equipment through which raw data (a sale, a payment, a supplier's bill) enters the machine. A keyboard for typing entries, a mouse for selecting menu options, and a scanner for reading a printed bill or a barcode are common examples in an accounts office.
• Central Processing Unit (CPU) — often called the "brain" of the computer. It carries out the actual arithmetic and logical work — adding a column of figures, comparing a bill against a budget limit, deciding which ledger an entry belongs to — following the instructions written into the accounting software.
• Storage — the part of the system that holds data even when the power is off. A hard disk or a solid-state drive inside the computer keeps the full set of vouchers, ledgers and reports built up over months or years, while temporary working memory (RAM) holds only what is being used at that instant.
• Output devices — the equipment through which the processed result reaches the user again: a monitor screen to view a ledger on-screen, and a printer to produce a paper invoice, a bank reconciliation statement, or a set of final accounts for a director to sign.

These four blocks work together in a simple, repeating cycle: data goes in → the CPU processes it against stored instructions → storage keeps a permanent record → output shows the result. Every later idea in this chapter — a computerised accounting system, an accounting information system, or a particular type of accounting software — is really just a more organised, more purposeful way of using this same basic input-process-output cycle for the specific job of keeping a firm's books.