fast and slow
Odd and even.
warrant and warrantless searches
Mentoplasties fall into two large categories: procedures that augment (increase) small or receding chins; and those that reduce large or protruding chins.
Comedies, Tragedies and Histories
Drugs and illegal drugsfast and slow
Two categories that fall under a substance are elements and compounds. Elements are made up of only one type of atom, while compounds are made up of two or more different types of atoms chemically bonded together.
There are actually several binary, mutually exclusive categories fiber optic cables can fall under. The most common is propagation mode, of which the two types are single mode and multimode.
They fall into two categories: continent diversion and conduit diversion.
Generally they fall into two broad categories: hardware and software.
private- affects only a portion of peoplepublic- affects everyone
Engeneering and specialty teams
The economies of scale attainable from large scale production fall into two categories. Internal and External.