When I was a young fellow, stabbing aching numb fingers at a cold hard ZX81 keyboard, I remember noticing that Psion, a company that had produced many of the shiny commercial ZX81 tapes I had beside my computer had their name on a new kind of device. Psion was an English company that began life writing software mainly for the Sinclair home computers. In 1984 they released a new kind of device; a small, battery powered handheld computer marketed as "the world's first practical handheld computer". This device, the Psion Organiser, is commonly regarded as the first PDA and eventually lead to the smartphone and tablet market we have today.
After thirty years I finally have one.