CPU cache. A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory. A cache is a smaller, faster memory, closer to a processor core, which stores copies of the data from frequently used main memory locations. Most CPUs have different independent caches, including instruction and data caches, where the data cache is usually organized as a hierarchy of more cache levels (L1, L2, etc.).
USPS Tracking is a way for you to make sure that your most important packages make it to their final destinations. The US Postal Service can tell you the date, time and zip code where your item was delivered, giving you peace of mind.
When To Use Certified Mail. Certified Mail is a special USPS service that provides proof of mailing via a receipt to the sender. With electronic USPS Tracking, the sender is notified when the mailing was delivered or that a delivery attempt was made.Additional options like Return Receipt provide evidence of delivery in the form of a postcard signed by the recipient or an e-mail with an electronic copy of the recipientâs signature.ith electronic USPS Tracking, the sender is notified when the mailing was delivered or that a delivery attempt was made. Additional options like Return Receipt provide evidence of delivery in the form of a postcard signed by the recipient or an e-mail with an electronic copy of the recipientâs signature.