ACRP Report 78 "Airport Ground Support Equipment (GSE) : Emission Reduction Strategies, Inventory, and Tutorial" has a list of the vehicles that can be found at an airport. I have extracted the list and it is shown below. It is the most comprehensive list I have come across and it is extremely useful for the airport novice as it has pictures.
As part of airport planning, it is essential to be familiar with the vehicles that can be be found at an airport. The airside roadway system has to be planned with these vehicles in mind. Some are oversized in terms of width, some are tall, some move slowly. Other considerations are the maintenance, refueling and washing of these vehicles. The staging and storage of these vehicles are another concern. In addition, their movement should not interfere with the safety and movement of the aircraft.
Source of pics: TRB ACRP Report 78
As part of airport planning, it is essential to be familiar with the vehicles that can be be found at an airport. The airside roadway system has to be planned with these vehicles in mind. Some are oversized in terms of width, some are tall, some move slowly. Other considerations are the maintenance, refueling and washing of these vehicles. The staging and storage of these vehicles are another concern. In addition, their movement should not interfere with the safety and movement of the aircraft.
Source of pics: TRB ACRP Report 78