Compiled by David Olmos, Times staff writer

Able Computer, a small Irvine electronics company, has sold part of its operations to an Oregon firm for an undisclosed price in an effort to concentrate on its primary business of producing communications equipment for large computer manufacturers.

Able sold its circuit board manufacturing operation to the Logical Co. in Cottage Grove, Ore., which makes computer add-on boards. Logical is headed by Les Wellington, a co-founder of Able.

The sale is part of an effort to focus on producing computer communications equipment--known as local area networks--for products made by Digital Equipment Corp., International Business Machines and other companies, Able said.

Local area networks allow computers, printers and other electronic equipment to communicate with each other within an office.