magic number n.
[Unix/C; common] 1. In source code
some non-obvious constant whose value is significant to the
operation of a program and that is inserted inconspicuously in-line
(hardcoded), rather than expanded in by a symbol set by a
commented #define....
profile n.
1. A control file for a program, esp. a text
file automatically read from each user's home directory and
intended to be easily modified by the user in order to customize
the program's behavior....