Somebody put together a very helpful list of all of the PIC microcontrollers out there, their specifics, and most importantly what their configuration bits (fuses) mean and what the constants map to. For example, MCLRE=off is 0xfdf.
Somebody came up with a five-bit code to replace the alphabet. You, too, can depict words as two-dimensional barcodes and give yourself migraines trying to read Shakespeare in the original Baudot!