Active Memory Technology Ltd has sold its 30th Distributed Array Processor system to an academic institution, bringing its sales to academics to UKP2.5m. This compares with 13 systems sold to commercial organisations and 35 to the defence sector, mainly in the US. The systems use distributed array processing elements and are supplied either as attached processors for use with a range of Sun Microsystems workstations or DEC VAX minicomputers, or as OEM products. Array processors have been in use in scientific computing for some time, although Active Memory has been shipping since 1988. They perform a limited form of parallel processing – more than one item of data can be processed simultaneously but only one instruction can be executed at a time. True parallel systems enable each processor to perform different operations on different data at the same time. Active Memory Technology says that applications being covered by the institutions include image and signal processing, genetic sequence matching, medical imaging, computer design simulation and neural networks. The processors are sold to academics at a 25% discount. The Reading-based company was a management buy-out of the original DAP business, and ICL retains a minority stake.