Grips

Overhand grip, underhand grip - the way to hold the handles
Wide grip, narrow grip, medium grip - the distance between left & right hands
T-bar grip, V-bar grip - handle/bar used to grip

After today experiments with pull-downs and cable seated rows, I found that different grips stimulate slightly different muscle groups. Certain muscles (such as back, biceps & triceps) can benefit significantly from varying the grip styles (such as in supersets)...