Positions
| Device | Positions | Positions (not installed) | Package |
| 16k PET board assy 320351 | UI2, UI3, UI4, UI5, UI6, UI7, UI8, UI9 | UJ2, UJ3, UJ4, UJ5, UJ6, UJ7, UJ8, UJ9 | DIP |
| 32k PET board assy 320351 | UI2, UI3, UI4, UI5, UI6, UI7, UI8, UI9, UJ2, UJ3, UJ4, UJ5, UJ6, UJ7, UJ8, UJ9 | | DIP |
| 16k PET board assy 8032090, 8032080, 8032030 | UA5, UA7, UA9, UA11, UA13, UA15, UA17, UA19 | UA4, UA6, UA8, UA10, UA12, UA14, UA16, UA18 | DIP |
| 32k PET board assy 8032090, 8032080, 8032030 | UA4, UA5, UA6, UA7, UA8, UA9, UA10, UA11, UA12, UA13, UA14, UA15, UA16, UA17, UA18, UA19 | | DIP |
| SuperPET compu/think board | U29, U30, U31, U32, U33, U34, U35, U36, U37, U38, U39, U40, U41, U42, U43, U44, U45, U46, U47, U48, U49, U50, U51, U52, U53, U54, U55, U56, U57, U58, U59, U60 | | DIP |
| 64k PET memory expansion board | UA5, UA6, UA7, UA8, UA9, UA10, UA11, UA12, UB5, UB6, UB7, UB8, UB9, UB10, UB11, UB12, UC5, UC6, UC7, UC8, UC9, UC10, UC11, UC12, UD5, UD6, UD7, UD8, UD9, UD10, UD11, UD12 | | DIP |