RR Auction is hosting "Steve Jobs & the Computer Revolution: The Apple 50th Anniversary Auction Part Two," featuring over 200 items tied to Apple and its co-founder. Nearly 40 items relate directly to Steve Jobs, including his 8th-grade science fair project—a tri-fold display explaining silicon-controlled rectifiers. The auction includes Jobs-signed memorabilia such as a NeXT Inc business card with a handwritten note to his father.

Many items trace back to the Jobs family home in Los Altos, including a rainbow-striped Apple sun catcher and vintage computers. John Chovanec, Jobs' stepbrother, is believed to be releasing additional items for Apple's 50th anniversary, including a 10-year employee service award once given to him. Other highlights include vintage Apple marketing materials, a DVI monitor shaped like an iPhone 3G, and employee apparel. A few non-Apple items are also up for bid, such as Twitter office memorabilia and a flag from Microsoft's first Windows headquarters.

Bidding is now open through RR Auction's online platform.