Diode (DIO) started in 2014 and finished in 2015, with a total supply of 4.2 million coins. The team/founder is hidden, The main reason this coin was listed is desertion.

(from old site) We are proud to announce Diode, the currency for you!. Diode aims to be the newest and greatest crypto-currency to hit the scene. We want Diode to be the currency that;.everyone talks about, everyone wants and soon to be the currency that everyone uses! Diode has a simple, effective, easy and fast distribution that spans over 3000 Blocks. Hashing will be done with the X13 Algorithm, and PoS will start at block 2800.