A/L ICT Lesson 03: Data Representation & Number Systems

Bilingual lesson notes for Unit 3 of the Sri Lankan GCE A/L ICT syllabus. This lesson covers fundamental number systems (Binary, Octal, Hexadecimal), negative number representation including Two’s Complement, floating point concepts, character encoding standards like ASCII, Unicode, BCD, and EBCDIC, as well as essential bitwise logical operations. Includes interactive base converters, math simulators, structured questions, and 5-option MCQs.