A chrome is simply reversal film. The photographer is shooting a positive instead of a negative in the camera. The most common name for a 35mm chrome is a slide. All reversal films, or slide films end in the word "chrome": Kodachrome, Ectachrome, Fujichrome, etc.
A proof sheet or contact sheet is usually an 8x10 contacted printed of all of the negatives from a roll of film. Commercial labs have begun to print these on 3x5 prints as an index referance sheet.
"Woof " is a Nancyism. Instead of saying woah or stop or that's good she
says, "WOOF!!!"
You'll get used to it, everybody does.