"Computer Science unplugged": HTML5 Crossword

Across

2. mathematician who lived in Lincoln and developed the maths of True and False (5)
5. the uncompressed message from q9 (13)
7. footballer from q8 (6,8)
8. prefix meaning a billion of something (4)
10. another name for base sixteen (11)
11. data included at the beginning of an image file giving information about the format (8)
12. a measurement taken during the digitisation of an audio file (6)
13. the animal mentioned in the uncompressed answer to q10 (7)
15. boxer who won on Saturday night (5,4)
16. codebreaker famous for work on the enigma cipher (4,6)
18. eight bits (4)
19. number system using zeros and ones (6)

Down

1. prefix meaning 1000 of something (4)
2. the number of bits used to store the colour of an image pixel (3,5)
3. footballer from q7 (9,7)
4. another name for base ten (6)
6. cricketer from q6 (5,8)
9. pakistan white ball cricket captain Babar_____ (4)
14. a stereo audio file has two of these (8)
17. half a byte (6)