Given the following passage  "Some computers are designed to distribute their work across several CPUs in a multiprocessing configuration, a technique once employed only in large and powerful machines such as supercomputers, mainframe computers and servers. Multiprocessor and multi-core (multiple CPUs on a single integrated circuit) personal and laptop computers are now widely available, and are being increasingly used in lower-end markets as a result.",  answer the following question. Note that the answer is present within the text.  Question: What are usually found in mainframe computers?
The answer to this question is:
several CPUs