Given the question: I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the 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."?
The answer is:
What was once found only in large machines?