ACROSS
2. Electronic lesson (5)
3. Envelope stuffing day (8)
4. 4.0203·1020 hp/Pc (6)
5. Coconut’s successor, chiefly Brit. (7)
8. Essential command in games (4)
9. #852 developed its card reader (5)
10. Chip orbited by 9-across (6)
12. The latest fashion in colours (4)
13. The last wizard (6)
16. Adding machine (4)
17. It can fill up a bus (6)
19. A no longer privileged 11-down (5)
20. Refined people’s language (3)
DOWN
1. Reader’s favourite toy (10)
5. Ancient spell for transcendental matters (6)
6. Bill Hewlett’s 35 (6)
7. A particularly suffering HPCC member (6)
9. Ubiquitous hyper-addictive video game (6)
11. According to Murphy: something prone to beep (3)
12. The slowest way of doing things (5)
14. Cheap cow (5)
15. Teacher’s nightmare (6)
18. The HP-01 watch (5)