| 1S | Side one The location is side one. | 
| 2S | Side two The location is side two. | 
| AA | On surface To indicate that the entity being specified is on the surface. | 
| AB | Off surface To indicate that the entity being specified is off the surface. | 
| AC | Soluble Specifies that the surface/layer/position being described is the soluble portion. | 
| AD | Opposite corners The surface or layer of the product being described is the opposite corners. | 
| AE | Corner Diagonals The surface or layer of the product being described are the corner diagonals. | 
| AF | Port The left-hand side (looking forward) of a ship, boat or aircraft. | 
| AG | Starboard The right-hand side (looking forward) of a ship, boat or aircraft. | 
| AH | Tooth facial surface Surface of a tooth directed toward the face and opposite the lingual surface. | 
| AI | Tooth incisal surface Surface of the tooth relating to the cutting edge of the anterior teeth, incisors or canines. | 
| AJ | Tooth distal surface Surface of the tooth toward the back of the dental arch, or away from the midline. | 
| AK | Tooth buccal surface Surface of the tooth pertaining to or around the cheek. | 
| AL | Tooth occlusal surface Surface of the tooth pertaining to the masticating surfaces of the posterior teeth. | 
| AM | Tooth lingual surface Surface of the tooth pertaining to or around the tongue. | 
| AN | Tooth mesial surface Surface of the tooth toward the midline of the dental arch. | 
| BC | Back of cab The location is at the back of the cab. | 
| BS | Both sides The location is both sides. | 
| BT | Bottom The location is on the bottom. | 
| DF | Dual fuel tank positions The location is in the dual fuel tank positions. | 
| FR | Front The location is in the front. | 
| IN | Inside The location is in the inside. | 
| LE | Left The location is on the left. | 
| OA | Overall The location is overall. | 
| OS | One side The location is on one side. | 
| OT | Outside The location is on the outside. | 
| RI | Right The location is on the right. | 
| RR | Rear The location is in the rear. | 
| ST | Spare tyre position The location is the spare tyre position. | 
| TB | Tank bottom The location is at the tank bottom. | 
| TP | Top The location is on the top. | 
| TS | Two sides The location is on two sides. | 
| UC | Under cab The location is under the cab. |