GCSE EDEXCEL Topic 2A – Binary GCSE EDEXCEL Topic 2A Bit patterns GCSE EDEXCEL Topic 2A Number bases GCSE EDEXCEL Topic 2A Signed integers using two’s complement GCSE EDEXCEL Topic 2A Converting between denary and 8 bit binary GCSE EDEXCEL Topic 2A Adding two 8 bit binary integers GCSE EDEXCEL Topic 2A Binary shifts GCSE EDEXCEL Topic 2A Converting between denary and 2 digit hexadecimal GCSE EDEXCEL Topic 2A Why hexadecimal is used in computer science Also in this topic... GCSE EDEXCEL Topic 1A – Computational thinking and algorithms GCSE EDEXCEL Topic 1B – Computational logic GCSE EDEXCEL Topic 3A – Hardware GCSE EDEXCEL Topic 4 – Networks and network security GCSE EDEXCEL Topic 5 – Issues and impact