ICT for Commerce Students
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ICT is a popular third subject for commerce students, and the same A/L ICT syllabus is used in all streams. It has units on the concept of ICT, computer systems, data representation, networks, systems analysis, databases, programming, and web development (NIE, n.d.-i; Tutorlanka, n.d.). The companion volume Advanced Level Physical Science describes these units in detail (including the Python code and SQL examples); this chapter highlights what matters most to a commerce student.
Core Content in Brief
| Unit | Key ideas | Business link |
|---|---|---|
| Concept of ICT | Data, information, knowledge; the information processing cycle; the characteristics of good information | Decision making and reporting |
| Computer systems | Hardware, software, operating systems; memory and storage; input and output | Choosing and managing business technology |
| Data representation | Binary, octal, hexadecimal; two's complement; character sets; image and sound representation | How data are stored and transmitted |
| Networks | LAN, WAN, topologies; the OSI and TCP/IP models; IP addressing; security | E-commerce, cloud systems, and internal networks |
| Systems analysis and design | The system development life cycle; fact-finding; data flow and ER diagrams; testing and implementation | Developing business information systems |
| Databases | The relational model; keys; normalization; SQL | Customer, inventory, and accounting databases |
| Programming | Algorithms; Python basics: variables, selection, loops, functions, lists, files | Automating tasks and analyzing data |
| Web development | HTML, CSS, server-side scripting, and databases | Business websites and online shops |
Spreadsheets for Accounting and Statistics
A spreadsheet is the most useful business tool. Learn:
- Formulas and functions: SUM, AVERAGE, IF, VLOOKUP or XLOOKUP, SUMIF, COUNTIF, and financial functions (NPV, IRR, PMT).
- Data presentation: tables, charts, and pivot tables.
- Models: build a loan schedule, a break-even model, or a budget, and use what-if analysis.
- Good practice: separate inputs from calculations, label clearly, and check for errors.
E-Commerce and Digital Payments
E-commerce includes online retail, marketplaces, mobile commerce, and digital payments. Understand payment methods, encryption and HTTPS, fraud risks, digital marketing, logistics, and customer data protection. The Electronic Transactions Act, No. 19 of 2006 and the Personal Data Protection Act, No. 9 of 2022 are examples of Sri Lankan laws relevant to digital business; check their current provisions.
Artificial Intelligence in Business
AI tools can help analyze data, draft documents, support customers, and forecast demand. They also bring risks: errors and invented facts, bias, privacy breaches, and over-reliance. Follow your school's policy, disclose any use, and verify the output (Thesify, 2026).
Tips
Practise on a computer daily, learn a programming language at a basic level, and apply ICT in your other subjects, for example by modeling the accounting equation or plotting a supply and demand graph in a spreadsheet.
CHAPTER 19