Prog

1. a television or radio programme.

   I don't watch cookery progs

2. a computer program.

   there are progs for the PC that will convert images to sound

1930s: abbreviation of programme.

1. a style of rock music popular especially in the 1970s and characterized by classical influences, the use of keyboard instruments, and lengthy compositions.

   the band's blend of prog, psychedelia, and '60s pop

   I'm a child of the 60s and love prog rock

   a prog rock band

2. an advocate of social reform; a progressive.

   if she decides to run, the hard-core progs will not support her anyway

1. relating to or denoting rock music characterized by classical influences, the use of keyboard instruments, and lengthy compositions; progressive.

   one of the most important prog albums of all time

   Tesseract sound very prog to me

1950s (in sense 2): abbreviation of progressive.