MAI Systems Corp.: The Irvine computer systems...

MAI Systems Corp.: The Irvine computer systems designer has been given a $4-million secured credit line with Congress Financial Corp., an affiliate of CoreStates Bank. MAI officials said the credit line will allow them to pursue growth and new business opportunities, although the credit has not been earmarked for any specific projects. MAI, which emerged from bankruptcy in November, 1993, installs and supports information systems for hotels, resorts and casinos.