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.
In order to track your package by using USPS tracking to then, you can follow the procedure which will help you. 1  At first, you should go to the official website of USPS in order to track a package. 2  You will then find a box in which you should enter your tracking number or waybill number.