On record, multiple key presses were merged into a single programming step.

Like its predecessor the FX-602P series supported 10 labels for programs and subroutines called P0 .. P9.

Each program or subroutine could have up to 10 local labels called LBL0 .. LBL9 for jumps and branches.

The FX-601P and FX-602P supported indirect addressing both for memory access and jumps and therefore programming model could be considered Turing complete.

The FA-2 Interface was used the FX-602P series of programmable calculator and the FX-702P Pocket Computer to store programs and data register to Compact Cassette.