Western Digital EC1422B
<p>Calculator chip
</p>
Manufactured in a P-channel MOS process and using Dual-Inline-Ceramic cases with 40 pins.
<a href="//commons.wikimedia.org/wiki/User:Mister_rf" title="User:Mister rf">Mister rf</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>