A San Francisco recycling centre is seeking a woman who may have handed over a rare Apple I computer by mistake.
The machine was among other components and computers the woman wanted to dispose of after her husband died.
Only about 200 of the first-generation Apple computers were made.
The company recognised the value of the old computer and sold it to a private collector for about $200,000 (£131,000).
Tiny memory
The recycling centre, called Clean Bay Area, has launched a web and media campaign to track down the woman so she can receive her half of the cash they got for the machine.
It has produced a short video it is asking people to share to see if they can reach the donor.