The following libraries defined in PIM are provided:
| InOut | general-purpose IO operations |
| LongInOut | LONGREAL numbers IO operations |
| MathLib0 | mathematical functions |
| RealInOut | REAL numbers IO operations |
| Terminal | computer’s terminal IO operations |
The library LongInOut (similar to RealInOut) is not described in PIM. All PIM libraries are implemented on a basis of the ISO library. Since PIM Storage library is not compatible with the corresponding ISO library, it is omitted.