Two diversified US software distribution, computer services and systems integration companies, Caci International Inc, Arlington, Virginia and Comarco Inc, Anaheim, California are joining forces. They announced yesterday that they have signed a letter of intent to merge under the name Comarco International Inc. Under terms of the letter of intent, shareholders of Comarco will receive 1.075 shares of Comarco International for each of their shares. Shareholders of Caci will receive one share of Comarco International for each of their shares. The companies look to reach a definitive merger agreement by May 17 and see closing by July 31. Separately Caci said it has arrived at agreements to settle shareholder lawsuits pending in Delaware Chancery Court and in the District of Columbia. Terms include establishment of a $600,000 fund to pay some shareholder claims, and Caci has agreed to reimburse the plaintiffs for reasonable legal fees and expenses up to a total of $573,000. The fund will be available on a claims-made basis to cover any loss suffered by a former shareholder who held shares during the period April 16 to December 1 1990, and sold that stock at a loss as defined in the settlement agreement. This is contingent on completion of the merger and on court approval.