Forklifts and warehouse trucks are grouped into classes within the material handling business. There are several regional classifications used around the world but the international standard is called WITS.

The WITS classes are

• Class 1 = Electric Counterbalance rider trucks
• Class 2 = Electric warehouse rider trucks (VNA-trucks, Rider stackers and Rider reach trucks)
• Class 31 = Electric low-lift pedestrian trucks (with service weight below 250kg)
• Class 32 = Electric warehouse pedestrian trucks (other than class 31; Pedestrian stackers, Horizontal order pickers and Tractors)
• Class 4-5 = Internal combustion Counterbalance trucks (cushion and pneumatic)