Editing DARPA Speech Understanding Research (section)

=== General overview ===
DARPA's program, despite achieving the set goals, did not result in a speech understanding system for daily or even military use. The resulting systems were too restricted in terms of syntax, yielded semantic errors and required large computational resources. Performances of the different systems were also difficult to compare because of the different vocabularies and domains employed. The Hearsay-II and HARPY results, however, are comparable, as the two systems were tested on the same tasks using the same test data, with HARPY's performance dominating Hearsay-II's in both accuracy and computation speed. In general, HARPY was the only system clearly to meet and exceed the DARPA specifications.