INTRODUCTION (Note: In this Data Item@ data options and facilities which are not available in the current release of the program are presented in italic script.) A ready-reference summary of the input and output options and the keywords used by the programs that make up the ESDU Aircraft Performance Program are given in this Data Item. These programs are as follows. ? APP_02@ the Flight Performance Program. (Input and output data are described in detail in Part 5 (Reference 10).) ? APP_03@ the Interpolation Program.