https://www.lenovo.com/us/en/glossary/
Upgrading and Repairing PCs, Scott Mueller, 2015,
Build Your Own Gaming PC: The step-by-step manual to building the ultimate computer, Adam Barnes, 2019, ISBN-13: 978-1785216688
Net+ Sec+ A+
https://www.computerlanguage.com/results.php?definition=virtual