132 is short for "Fuck you" dirived from the way one can count in ten fingers in binary. If you assign your digits from your thumb to your pinky 1, 2, 4, 8 and 16 on one hand and then 32, 64, 128, 256 and 512 on the other hand then the number 132 would be displayed using both middle fingers exclusively.
"And then he picked up the last copy off the shelf so I gave him 132."
Compact Disk Rewritable, n.: A CD that you can burn with various amounts of data multiple times or erased unlike a CD-R which can only be burned once and cannot be erased.
CD-RW have a much higher cost than CD-R's and slower burning rates and thus less used.
I prefer to use CD-RW for work because I can reuse them, but for permanent things I like to use CD-R.