In order to quickly record data during test runs, the DRTE built a custom system known as DAR, the "Digital Analyzer and Recorder". DAR was a fairly high-priority project, and some of the manpower originally working on the DRTE computer were put on DAR instead. The machine itself consisted of a non-programmable computer that read the data into 40,000 bits of core memory, tagged it with timecode and other information, and then wrote it to magnetic tape. DAR was used for a number of years, and had to be rebuilt after a fire in 1962.