Las Vegas-based Summa Corp. said it is...

Las Vegas-based Summa Corp. said it is changing its name immediately to The Howard Hughes Corp. . . . Adobe Systems Inc. completed its $450-million purchase of Aldus Corp. . . . Viacom Inc. said it has agreed to sell its TV station in Philadelphia, WTXF, to Fox Television Stations Inc. for $200 million and other unspecified consideration.

Live Entertainment Inc. said it completed the $35-million sale of its specialty retail division, which the company agreed to sell as part of its merger with Carolco Pictures Inc. . . . Machinists approved a revised labor agreement with Trans World Airlines that is designed to save the struggling carrier about $90 million a year.