Accountancy: Class 12 (Part 1) — Chapter 1: Overview of Computerised Accounting System

Introduction to Computerised Accounting System (CAS)

A Computerised Accounting System (CAS) refers to the processing of financial transactions through the use of hardware and software to produce accounting records and reports. It takes transactions as inputs, processes them through accounting software, and generates key financial statements and reports.

The Five Pillars of CAS

Procedure: A logical sequence of actions to perform a task.
Data: The raw facts used as input for business applications.
People: The users who interact with the system.
Hardware: The physical computer, peripherals, and network components.
Software: System software and application software that drive the system.

Data vs. Information

A data-item is the smallest named unit of data in an information system. In accounting, a transaction consists of data elements like account name, accounting code, date, and amount. Data is processed and transformed into meaningful information to assist decision-makers.

Salient Features of CAS

Simple and Integrated: Automates and integrates business operations like sales, finance, purchases, and inventory.
Transparency and Control: Enhances data accessibility and provides greater transparency for daily operations.
Accuracy and Speed: Utilizes user-definable templates for rapid and error-free data entry.
Scalability: Easily adjusts to changes in the volume of data processing and business size.
Reliability: Ensures critical financial information is secure, controlled, and accurate.

Grouping and Codification of Accounts

Proper classification of data is essential as business transactions grow. Modern accounting is based on the double-entry system, represented by the fundamental Accounting Equation:

$$\text{Assets} = \text{Liabilities} + \text{Capital}$$

To account for operational revenues and expenses, the equation is expanded as:

$$\text{Assets} = \text{Liabilities} + \text{Capital} + (\text{Revenues} - \text{Expenses})$$

Methods of Codification

A code is an identification mark used for machine processing and systematic classification. Common codification methods include:

Sequential Codes: Numbers or letters assigned in consecutive order (e.g., CL001, CL002).
Block Codes: A range of numbers partitioned for specific groups (e.g., 100-199 for Small Pumps).
Mnemonic Codes: Alphabets or abbreviations used as symbols (e.g., SJ for Sales Journal).

Security, Advantages, and Limitations of CAS

Security Features

Password Security: Restricts system access to authorized users based on organizational policy.
Data Audit: Tracks changes made to original data, establishing an audit trail.
Data Vault: Provides advanced security through data encryption.

Advantages of CAS

Timely generation of reports in desired formats.
Highly efficient record-keeping and effective system control.
Lower cost of data processing and maintained confidentiality.

Limitations of CAS

High risk of technological obsolescence.
Potential data loss or corruption due to power failures or hardware damage.
Vulnerability to hacking and security breaches.

Accounting Information System (AIS) Sub-systems

An Accounting Information System (AIS) integrates various functional sub-systems to streamline organizational workflows:

Cash and Bank Sub-system: Manages receipts, payments, and electronic fund transfers.
Sales and Accounts Receivable: Records sales transactions and tracks customer balances.
Inventory Sub-system: Monitors stock levels, purchases, issues, and valuations.
Purchase and Accounts Payable: Manages vendor transactions and payment schedules.
Payroll Accounting: Computes employee wages, salaries, deductions, and benefits.
Fixed Assets Accounting: Tracks asset additions, depreciation, and book values.
Tax Accounting: Ensures compliance with tax regulations (VAT, income tax, etc.).
Management Information System (MIS): Generates vital reports to support managerial decision-making.