Fault-tolerant Unix systems builder Sequoia Systems Inc, Marlborough, Massachusetts is diversifying with the acquisition of the Pick64+ software product from Alpha Microsystems Inc, Santa Ana, California. Pick64+ is a database environment that runs on Intel Corp iAPX-86-based computers and supports five to 195 users. Sequoia already offers Pick on its big machines, and says that Pick64+ will be sold with computers built by its other planned acquisition target, Texas Microsystems Inc, of Houston, Texas. The deal fills in Sequoia’s Pick offerings below its Unix line and also gives it access to some 100 US dealers that have previously sold Alpha Micro products, and these will now be offered Pick64+ on Texas Micro machines, and will also be invited to offer the mid-range Sequoia Unix line. During 1994, Alpha Micro says it sold some 4,000 licences of Pick64+ to its dealers. Terms of the acquisition were not disclosed.