NEW YORK - It still works! This green motherboard is a rare example of an original Apple I, the first computer built by Steve Jobs and Steve Wozniak, in 1976.  Before the Apple, computers were enormous, unwieldy machines that could only be operated by an expert. This compact model enabled users to type on a keyboard, and started the personal computing revolution. The current owner came to Sotheby's last week to demonstrate the many basic programs that can be run on the device, which will be offered in the Books and Manuscripts auction in New York on Friday with an estimate of $120,000-180,000.