Chapter 16: Computers in Accounting
Written Exam Master Guide • Extracted strictly from Module VI, Lesson 16 (224en16)
1. Meaning, Characteristics and Hardware Components of a Computer
Core Textbook Definition:
A computer is an electronic device that can perform a variety of operations in accordance with a set of instructions called a programme. It is a fast data processing electronic machine that provides solutions to complicated situations. It accepts data from the user, converts data into information, and gives the desired result. Therefore, a computer is defined as a device that transforms data into information.
In accounting and business context, data represents raw facts and figures, such as marks obtained by students, names, ages, gender, weights, or national savings and investments. The computer is functionally defined as an electronic device that accepts data, stores data, processes data as desired, retrieves stored data as and when required, and prints or displays the result in a desired format.
Seven Distinctive Characteristics of a Computer
A computer accesses and processes data millions of times faster than human beings. All computer operations are caused by electrical pulses that travel at the speed of light. Most modern computers are capable of performing 100 million calculations per second.
Computers have immense storage capacity within an extremely small physical footprint. They possess the capability to retain vast amounts of data, business transactions, digital pictures, and audio in digital form for indefinite durations.
The accuracy of computers is consistently high. Errors occur primarily because of human failure rather than technological weakness. The primary sources of error are flawed programming by users or the entry of inaccurate raw data (GIGO principle).
A computer is completely free from physical fatigue, tiredness, monotony, and lack of concentration. Even when executing 10 million repetitive calculations, it completes the final computation with the exact same speed and precision as the first.
A single computer can perform diverse tasks across various operational domains. In a business enterprise, the identical computer can manage financial accounts, calculate electric bills, send electronic mails, prepare management reports, and handle administrative databases.
Computers function as powerful communication devices when networked via cables within an office intranet. Over their technological evolution, computers have transformed from bulky research prototypes into faster, smaller, cheaper, more reliable, and highly user-friendly business assets.
Three Major Hardware Components (Section 16.2)
A computer system comprises three essential functional hardware units: the Input Unit, the Central Processing Unit (CPU), and the Output Unit.
This unit controls input devices used to enter transaction data into the computer. Common input devices include the keyboard, mouse, and scanner. Additional devices include magnetic tape, magnetic disk, light pen, bar code reader, and smart card reader. Devices responding to voice and physical touch are also widely deployed (e.g., physical touch screens installed at airports for flight arrival and departure tracking). The Input Unit is responsible for taking user input and converting it into the binary system (machine-readable language).
The CPU is the central control hub that guides, directs, and governs the performance of the entire system. It stores programs, graphics, photos, and operational data, and executes instructions. The CPU is partitioned into three vital sub-units:
- Control Unit (CU): Directs, coordinates, and synchronizes the activities of all internal and peripheral components.
- Memory Unit: Holds raw data and processing instructions before and during processing before data is transferred from input channels.
- Arithmetic Logic Unit (ALU): Executes all numerical operations (addition, subtraction, multiplication, division) and evaluates logical comparisons between variables.
Following data manipulation, the output unit transforms processed binary results into human-readable information understandable by accounting personnel. Standard output devices include monitors, printers, plotters, and audio speakers.
2. Limitations and Operating Constraints of Computers
Despite their processing speeds and immense accuracy, computers suffer from inherent operating environment limitations that every accounting professional must recognize:
Hardware configurations and software licenses require periodic upgrading as updated versions emerge. Enterprises must invest heavy capital outlays every time new system iterations are deployed.
To utilize new accounting software versions efficiently, accounting staff must undergo structured training, which involves substantial recurring expenditure and lost work hours.
A computer possesses zero inherent common sense or intuition. It cannot formulate autonomous managerial judgements; it operates strictly according to predefined programmatic instructions and user parameters.
Computers necessitate pristine, clean, dust-free physical environments with controlled temperatures (air conditioning) to function efficiently, leading to continuous overhead costs.
Continuous, extensive computer operation produces occupational health hazards among accounting operators, including eyestrain, muscular pain, and chronic backache. This adversely affects staff productivity and inflates medical costs.
3. Applications in Accounting & Transaction Processing Systems (TPS)
Manual accounting requires maintaining physical books: journals, cash books, subsidiary registers, and ledgers. In contrast, computerized accounting relies upon relational database technology. Accounting software eliminates the need to maintain redundant physical journals and ledgers. Standard commercial software packages recognized in the textbook include Tally, Cash Manager, Best Books, and Busy.
Three Practical Applications of Computers in Accounting (Section 16.4)
- Preparation of Accounting Documents: Immediate generation of cash memos, sales invoices, bills, and accounting vouchers.
- Recording of Transactions: Implementation of a logical codification scheme where every account is assigned a unique alphanumeric code that places it automatically into its designated group.
- Automated Preparation of Trial Balance & Final Statements: Once vouchers are entered, data is automatically updated in ledger structures, allowing instant compilation of the Trial Balance, Trading Account, Profit and Loss Account, and Balance Sheet.
Transaction Processing System (TPS) & The ATM Lifecycle
The Transaction Processing System (TPS) represents the first operational stage of any computerized accounting architecture. Its purpose is to record, process, validate, and store transactions occurring across functional enterprise areas. Depending on resources used:
The textbook models the six procedural steps of TPS through an Automatic Teller Machine (ATM) banking transaction:
4. Need, Requirements and Structural Framework of Computerized Accounting
The transition from manual bookkeeping to computerized databases is driven by eight institutional imperatives:
Two Fundamental Requirements of Computerized Accounting (Section 16.7)
The operational environment of the system. A sound accounting framework—grounded in rigorous accounting principles, logical chart-of-accounts coding, and clear account groupings—is an essential prerequisite for any computerized implementation.
A well-conceived, structured operating workflow adapted to the enterprise's operational needs. Users interact with the organized database via an intuitive interface, transforming raw data into decision-ready financial reports.
5. Manual Accounting vs. Computerized Accounting Systems
The textbook highlights five structural differences between manual bookkeeping and computerized database accounting across recording, classification, summarising, adjusting, and financial statement generation:
1. Recording: In manual systems, transactions are penned in books of original entry (journal, cash book). In computerized systems, transaction details are entered once into an integrated database.
2. Classification: Manual systems require manually posting entries to individual ledger accounts. Computerized systems eliminate this data duplication; records are classified electronically when generating reports.
3. Summarising & Trial Balance: In manual accounting, balancing each ledger account is a necessary precondition for drafting a Trial Balance. In computerized accounting, the software generates trial balances directly from transaction records without requiring prior ledger generation.
4. Adjusting Entries: Manual accounting relies on manual adjusting entries for accruals, prepayments, and corrections to adhere to the matching principle. Computerized systems handle error corrections and adjustments systematically within the database structure.
5. Financial Statements: Manual systems require a completed, balanced Trial Balance before compiling final accounts. In computerized systems, final accounts can be generated independently of the Trial Balance.