AppleCare is Apple’s name for extended warranty and technical support plans for its devices. Apple hardware includes a one-year limited warranty and 90 days of technical support by telephone. The AppleCare extended warranty coverage and technical support extends the length and expands the coverage.
When introduced, AppleCare included this packaged CD containing hardware tests that might be used to help diagnose a problem during phone support. This version is from 2008 and matched the design and size of other boxed software Apple sold at the time.
Source: Wikipedia