По-английски читаете?https://www.google.ca/search?q=what+is+a+schedule&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=sb&gfe_rd=cr&ei=3caEU6-cGMjm9AbngIGQDA#channel=sb&q=what+is+schedule&rls=org.mozilla:en-US:official