Customer Removable Units (CRUs) are components of a computer system that is external to the computer tower, and are considered replaceable by the user of the system. Generally customer removable units will not cause a partial or total system outage if replacement procedures are not followed correctly.
CRUs are generally considered to be non-reimbursable by the manufacturer. An individual manufacturer will be able to provide you with a CRU list for your computer, as the list may vary based on the exact model of computer or notebook, and may vary from one manufacturer to another.
Webopedia Quick Reference: A Guide to System Memory Think deciding what computer to buy can be complicated? Just wait until you need to upgrade your system memory. We go inside Random-Access Memory (RAM) with a special focus on DRAM, which is — for now, anyway — the most common and affordable variety.
Webopedia's "Did You Know...?" Section Use this Webopedia knowledge section for an in-depth overview of specific technologies and occurrences in the areas of Computer Science, The Internet, and Computer Hardware and Software.
What You Need to Know About Motherboards You can think of the motherboard as a communications center. The purpose of the motherboard is to provide the means for all the other components and peripherals to talk to each other.
