Questions:

- impl defined vs C defined
    - There is a C standard
- pointers
- when **x vs *x[]
    - pick one
    - main(int argc, const char *argv[])
- what is a buffer
    - an array you plan to throw away
- when must you malloc
    - when you don't know how much you need at compile-time
- when must you free
    - when you, or a library function, malloced (and you're done with that memory)
- what is a server