Almost any permutation is availabe: you can buy a multi standard TV, you can buy a multi standard multi region DVD. There's some interesting info in the links on this site It's also worth noting that all PALs and all SECAMs are not the same technical specification.

When I was a TV engineer in another life we believed
NTSC = Never Twice The Same Colour
PAL = Pure And Lifelike
SECAM = Strategic Exercise Counter-AMerican

Stu