The Raspberry Pi, a credit card sized computer, has sold about one million units since its launch in February 2012.
"The folks at element 14/Premier Farnell announced today that they alone have now made and sold more than half a million Raspberry Pis."
"They're only one of two official distributors; we don't have completely up-to-date figures from RS Components yet, but Farnell's news suggests that we're well on the way to having sold our millionth Raspberry Pi," the company said in a blog post.
Last month, Raspberry Pi launched an app store, giving users the option to download different applications and programs.
The store has gone live with 25 apps, tools and games available free of charge or for a small fee.
The Raspberry Pi computer has been developed by a group of volunteers from the UK technology industry and the IT educational sector.
It runs a miniature ARM processor and performs like as a basic desktop PC does.
It is said to be ideal for operating spreadsheets, word-processing and some low-end games.
In September 2012, electronic products supplier Premier Farnell, signed an agreement with Sony UK Technology Centre to manufacture Raspberry Pi computers in Wales.