Nowadays a surprising number of people wear an Apple Watch. Doctors extol the information it can gather, busy folks love the notifications and connectivity, and the rest of us just like to have a reason to look away from other people. Some say that the precursor to the smart watch was an amazing device from Seiko: the UC-2000. Here’s more from Hackaday:
The UC-2000 very much looks cutting edge for its era, and absolutely ancient today. It featured a 4-bit CPU, 2 kilobytes of RAM, and 6 kilobytes of ROM. Display was via a simple 10×4 character LCD in a rectangular form factor, with four buttons along the bottom. Branded as a “personal information processor,” it was intended for use with the UC-2100 dock. This added a full physical QWERTY keyboard that interacted with the UC-2000 when the two were combined together. Alternatively, you could go for the UC-2200, which not only had a keyboard but also a thermal printer to boot. Oh, and ROM packs for Microsoft Basic, games, or an English-to-Japanese translator.