If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Sorter widget exercises

Problem

The "computer" is a high-level abstraction, and a computer can be implemented using other lower-level abstractions.
Sort these abstractions from highest (at the top) to lowest (at the bottom):
1