Types of calculus

lambda calculus
calculus of constructions
calculus of inductive constructions
calculus of variations
icosian calculus
differential calculus
integral calculus
selector calculus
discrete exterior calculus
multivariable calculus
single variable calculus.. <.<
nonstandard calculus

what are some more ?

Cactulus.  Figuring out how many needles can be used for any particular task takes some mathematical skill.