Harris Computer Systems Corp, the Fort Lauderdale, Florida security software specialist soon to change its name to CyberGuard Corp, has filed to offer 2.5m shares, 1.8m new. Concurrent Computer Corp, which bought Harris’s real-time computer business, will sell 341,589 shares out of the 701,835 shares to be sold by existing holders. Concurrent’s sale represents half the stock received by Concurrent in its proposed purchase of the real-time computer business. Most of the remaining shares from holders will be sold by Harris managers that are moving to Concurrent on July 1 and will have no management responsibility in Harris on an ongoing basis. Bear, Stearns & Co is managing underwriter, with Cowen & Co and Furman Selz to be the co-managers.