SLR 21 – Thinking logically (AS & A’Level) 128. OCR A Level (H046-H446) SLR21 – 2.1 Decision points in a solution 129. OCR A Level (H046-H446) SLR21 – 2.1 Determine logical conditions 130. OCR A Level (H046-H446) SLR21 – 2.1 Decisions & program flow Also in this topic... SLR03 – Input output and storage (AS & A’Level) SLR05 – Application generation (AS & A’Level) SLR06 – Software development (AS & A’Level) SLR14 – Data structures (AS & A’Level) SLR16 – Computer related legislation (AS & A’Level)