Abstract To simplify the dialogue between man and a digital computer for the solution of photogrammetric problems, a problem oriented language for photogrammetrists is being developed. The language (P.P.L.) will allow a user to address the machine with only well-known photogrammetric terms and thus will be very easy for the practicing photogrammetrist to learn. A complete range of normal photogrammetric production problems can be solved at the present using an unordered set of required descriptors in photogrammetric terms to supply data to the computer for the solution of a problem. All data input is free of the usual format restrictions for conventional computer solutions. The total system is intended to be housed in the environment of a large scale digital computer and will be an excellent tool in the era of time sharing.