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Computerised Accounting System, ISC Class 11 Accounts

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AccountsISC Class 11 · Computerised Accounting System

Computerised Accounting System: Components, Features and Limitations (ISC Class 11)

Updated 17 October 2026 · Fact-checked

A computerised accounting system (CAS) is a system in which accounting records are kept, processed and reported by accounting software on a computer instead of in manual books. Its components are hardware, software, people, procedures and data. Its main advantages are speed, accuracy and easy reports; its limitations are cost, need for skills, risk of data loss and security threats.

A computerised accounting system works only when all five components, hardware, software, people, procedures and data, come together.

Illustration drawn for QuestionBuddy.

Understand Computerised Accounting System: Components, Features, Advantages and Limitations

Meaning. The use of computer hardware and accounting software to record transactions, post them, prepare trial balance, final accounts and reports.

Components.

  • *Hardware:* computer, monitor, printer, storage devices, network.
  • *Software:* accounting software (ready-made, customised or tailor-made) and the operating system.
  • *People (users):* data entry operators, accountants, managers, system administrator.
  • *Procedures:* rules for data entry, checking, backup and security.
  • *Data:* vouchers, ledgers, masters (accounts, items) and balances.

Salient features.
1. Data is entered once in a voucher; the software posts it to the ledgers and reports automatically (single entry, multiple outputs).
2. Accounts are held as masters; groups and ledgers are created in advance.
3. Reports (trial balance, profit and loss account, balance sheet) are produced at any moment.
4. Built-in validation: a voucher with unequal debit and credit is rejected.
5. Password-protected access with different rights for users.
6. Data can be backed up and restored.

Advantages. Speed; accuracy; less paper and storage; quick reports for decisions; easy comparison across periods; control through user rights; integration with inventory and payroll.

Limitations. Cost of hardware, software and training; staff must be trained; risk of power failure, viruses, hacking and data loss; software may not suit every business; danger of overdependence; frauds are harder to see.

Manual vs computerised. Manual: books written by hand, errors by posting, slow reports, easy to see everything. Computerised: data entry through screens, automatic posting, faster, needs backup and security.

Selecting software. Compare cost, ease of use, suitability, reports, security, support and updates.

Computerised Accounting System: Components, Features, Advantages and Limitations: key facts

Components of CAS
  • Hardware
  • Software
  • People
  • Procedures
  • Data
Five components.
Single entry, many outputs
One voucher posts to ledger, trial balance and statements | Automatic posting
Core feature.
Backup rule
Backup copies = Regular schedule x Separate location | Restore when data is lost
Control against data loss.

How to answer Computerised Accounting System: Components, Features, Advantages and Limitations questions

Theory questions need precise lists with one-line explanations.

  1. 1Define the term in one sentence.
  2. 2List the points in the order of the syllabus.
  3. 3Give a short reason or example for each point.
  4. 4For comparisons, use a table with the same headings for both columns.

Computerised Accounting System: Components, Features, Advantages and Limitations in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Backup

Suppose a small shop keeps its accounting data on one computer and the disk fails after the owner has not copied data for a month.

What control would have prevented the loss?

Try it first, then show the solutionSolution
  1. Regular backup copies stored on a separate device or place.
  2. Restoring the last backup recovers all but the latest entries.

Answer: Regular backup stored separately.

Memory hook: No backup, no books.

Tricks to remember Computerised Accounting System: Components, Features, Advantages and Limitations

Short memory aids. Say each one aloud once, then use it on a question the same day.

  • H-S-P-P-D

    Hardware, Software, People, Procedures, Data.

    Use it when: Components.

  • Enter once, report many

    One voucher, every report updates.

    Use it when: Feature.

  • Speed vs safety

    Advantages are speed and accuracy; limitations are cost and security.

    Use it when: Advantages and limitations.

Computerised Accounting System: Components, Features, Advantages and Limitations: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Component · 1 mark · MCQBoard level

Rules for data entry and backup form which component of a CAS?
(a) hardware (b) software (c) procedures (d) data

Try it first, then show the solutionSolution
  1. Rules and routines are procedures.

Answer: (c) procedures

Example 2: Features · 4 marks · Short answerBoard level

State four salient features of a computerised accounting system. (4 marks)

Try it first, then show the solutionSolution
  1. Single entry updates all records.
  2. Reports at any time.
  3. Validation of debit and credit equality.
  4. Password access and backup.

Answer: Single data entry with automatic posting; instant reports; validation of voucher totals; user rights and backup.

Example 3: Manual versus computerised · 5 marks · Long answerHarder board level

A firm processes 120 vouchers a day. A clerk takes 3 minutes per voucher manually, including posting, and 1 minute with software including posting. Find the daily time and the time saved over 25 working days; state two non-time benefits and two risks. (5 marks)

Try it first, then show the solutionSolution
  1. Manual: 120 x 3 = 360 minutes = 6 hours a day.
  2. Computer: 120 x 1 = 120 minutes = 2 hours a day.
  3. Saving = 4 hours a day x 25 = 100 hours.
  4. Benefits: accuracy, instant reports. Risks: data loss, hacking.

Answer: Manual 6 hours, computerised 2 hours; saving 100 hours in 25 days; benefits accuracy and instant reports; risks data loss and unauthorised access.

Example 4: Cost-benefit · 5 marks · Long answerHarder board level

A business pays Rs 60,000 a year to two clerks for manual accounting and considers software costing Rs 90,000 (useful life 5 years) plus one operator at Rs 40,000 a year and annual maintenance Rs 6,000. Compare yearly cost and mention a factor beyond cost. (5 marks)

Try it first, then show the solutionSolution
  1. Software cost per year = 90,000 / 5 = Rs 18,000.
  2. Computerised yearly cost = 18,000 + 40,000 + 6,000 = Rs 64,000.
  3. Manual = Rs 60,000; computerised is Rs 4,000 more.
  4. Beyond cost: speed, accuracy and reports may justify it.

Answer: Computerised Rs 64,000 against manual Rs 60,000; the Rs 4,000 extra may be justified by accuracy and faster reports.

Example 5: Security reasoning · 4 marks · Short answerHOTS / competency

Some staff share one login so that any can enter vouchers. Explain two risks and two controls. (4 marks)

Try it first, then show the solutionSolution
  1. Risks: no accountability for who changed data; unauthorised changes or fraud.
  2. Controls: separate user IDs with rights; audit log and passwords changed regularly.

Answer: Shared login removes accountability and allows fraud; use individual passwords with defined rights and keep an audit trail.

Where students lose marks in Computerised Accounting System: Components, Features, Advantages and Limitations

The slips examiners see most often, and what to write instead.

  • Mistake: Listing only hardware and software as components

    Narrow view.

    Wrong working

    Hardware, software

    Right working

    Hardware, software, people, procedures, data

    Do this: Remember all five.

    Usually costs: 1-2 marks.

  • Mistake: Saying CAS removes the need for accounting knowledge

    Software does the work.

    Wrong working

    No accountant needed

    Right working

    The user must still understand debit and credit

    Do this: Accounting knowledge remains necessary.

    Usually costs: 1 mark.

  • Mistake: Ignoring limitations

    Only advantages listed.

    Wrong working

    Only advantages

    Right working

    Advantages and limitations

    Do this: Give a balanced answer.

    Usually costs: 1-2 marks.

Exam tips

  • Use headings and short lines.
  • Give a suitable example for each component.
  • For comparisons, use two columns.

Practice questions on Computerised Accounting System: Components, Features, Advantages and Limitations

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

  1. Q1 · 1 mark · MCQBoard level

    Which of the following is a limitation of computerised accounting?
    (a) speed (b) accuracy (c) risk of data loss (d) quick reports

    Hint

    A drawback.

    Answer

    (c) risk of data loss

  2. Q2 · 4 marks · Short answerBoard level

    Explain the components of a computerised accounting system. (4 marks)

    Hint

    Five components.

    Answer

    Hardware (computer, printer), software (accounting package), people (operators, accountants), procedures (data entry and backup rules) and data (vouchers, masters, balances).

  3. Q3 · 4 marks · Short answerHarder board level

    A bookkeeper in a manual system takes 4 minutes to post and check a voucher; the software takes 1.5 minutes. For 80 vouchers a day over 20 days find the time saved in hours. (4 marks)

    Hint

    Saving per voucher 2.5 minutes.

    Answer

    Saving per voucher = 2.5 minutes; per day 80 x 2.5 = 200 minutes; over 20 days 4,000 minutes = 66.67 hours (66 hours 40 minutes).

  4. Q4 · 4 marks · Short answerHarder board level

    A software package costs Rs 1,20,000 with a 4-year life, annual support Rs 9,000 and an operator at Rs 36,000 a year. Manual accounting costs Rs 72,000 a year. Find the yearly cost of each and the saving or extra cost. (4 marks)

    Hint

    Software per year = 30,000.

    Answer

    Computerised = 30,000 + 9,000 + 36,000 = Rs 75,000; manual Rs 72,000; extra Rs 3,000 a year for the computerised system.

  5. Q5 · 3 marks · Short answerHOTS / competency

    Is a computerised system always better for a tiny shop with five transactions a day? Evaluate in 3 points. (3 marks)

    Hint

    Cost, skill, volume.

    Answer

    Not always: the fixed cost of software and training may exceed the benefit; low volume means little time saving; but better reports and accuracy may help growth. The choice depends on volume and cost.

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

  1. 1.Five components of CAS?Show answer

    Hardware, software, people, procedures, data.

  2. 2.One limitation?Show answer

    Data loss or hacking risk.

  3. 3.Single entry means?Show answer

    One voucher updates all records.

  4. 4.What is backup?Show answer

    A copy of data stored separately.

  5. 5.Do users need passwords?Show answer

    Yes, with defined rights.

Computerised Accounting System: Components, Features, Advantages and Limitations: frequently asked questions

Is Excel a CAS?

A spreadsheet can be used, but accounting software has built-in controls.

Do vouchers still matter?

Yes, they are the source of data.

Is ledger posting manual?

No, automatic.

Who is the system administrator?

The person who controls users and security.