original_query: What were the features and advancements of the operator's console in the 2903/4 system cabinet?
query: What were the features and advancements of the operator's console in the ICL 2903/4 system cabinet?
answer: The ICL 2903/4 system cabinet's operator's console was a visual display unit (VDU), a significant advancement over the Westrex teletype console used with the 1900 series.