PAL and SECAM were variations on a theme developed by NTSC. The acronyms I have heard for each are interesting and define well the politics between the variations:
NTSC - Never Twice the Same Colour (as explained earlier in this threa)
PAL - Problems Are Lurking - This name probably arose from the editing of PAL. It was painful because of the 8 field colour sequence rather than the four NTSC offered.
SECAM - System Essentially Contrary to the American Method - With France and it possessions and the Soviet Bloc adoption, the name says it all.
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