An automated artwork generation system employs a video display and a microprocessor for verifying and editing data derived from a digitizer and utilized by a photoplotter. The system includes a data storage and retrieval apparatus in which data processed through the system is stored. The apparatus permits random access to data in a memory, and both the storing and retrieval times are minimized by establishing a direct relationship between the zone of a workpiece in which data is located and the portion of the memory in which the data is stored. Data entries in the memory are made in both a data entry file and a bulk data file. The entry file serves as an index to the bulk data file and contains abbreviated data entries and pointers identifying addresses in the bulk data file where additional related data is stored.