Whittaker will acquire Zeta Laboratories.

Los Angeles-based Whittaker Corp. will buy 86% of Zeta’s stock from Computer & Communications Technology for $6.50 per share, or about $33.6 million, and will begin a cash tender offer for the remaining Zeta shares at the same price. The total purchase price will be about $39 million. The acquisition has been approved by the board of directors of each of the three companies. Joseph F. Alibrandi, chairman and chief executive of Whittaker, said the acquisition fits the company’s growth strategy.