Don’t be deceived by its unassuming looks–this baby packs quite a punch, functionally speaking. In the early ’80s, Casio sought to provide a do-it-all device for the travelling businessman or busy student. The TA-1000 provides a nice calculator, a clock and a datebook of sorts (actually an array of six alarms each with a unique “chime”) in a slim and lightweight package. Take a look at the display, isn’t the day listing on the bottom pretty sweet? But you’ll agree the icing on the cake is the multiple alarm notifications.

Click here to hear the TA-1000 in action!