Top side of main processing board of Texas Instruments TI-nspire cx CAS calculator. The USB connector is in the top left-hand corner. The connector in the top right-hand corner is the proprietary Wi-Fi connector.
<a href="//commons.wikimedia.org/wiki/User:Selquim" title="User:Selquim">Selquim</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>