[C]

1. CBAUD
2. CHARS
3. CHAR_BIT
4. CHAR_MAX
5. CHAR_MIN
6. CHECK_LAST_NR
7. CHILD_MAX
8. CIBAUD
9. CLEAR_INTR
10. CLEAR_TIMER
11. CLOCAL
12. CLOCKS_PER_SEC
13. CMOS_READ
14. CODE_SPACE
15. CONST1
16. CONSTL2E
17. CONSTL2T
18. CONSTLG2
19. CONSTLN2
20. CONSTPI
21. CONSTZ
22. CON_COLS
23. CON_ROWS
24. COPYBLK
25. CR0
26. CR1
27. CR2
28. CR3
29. CRDLY
30. CREAD
31. CRTSCTS
32. CS
33. CS5
34. CS6
35. CS7
36. CS8
37. CSIZE
38. CSTOPB
39. CT_TO_SECS
40. CT_TO_USECS
41. CURRENT
42. CURRENT_DEV
43. CURRENT_TIME
44. C_HUP
45. C_SPEED