There are three boxes in this example, one centered at the top connected to a box on the left and one on the right. There is no direct connection between the box on the left and the box on the right.

The top centered box is labeled Media Content (Application Program).

The box on the left shows Quicktime at the top with MAC OS Operating System below. Separating these two is a square jagged line. Right underneath the MAC OS Operating System, separated by a straight line is the Power PC Motherboard.

The box on the left shows Quicktime at the top with Windows Operating System below. Separating these two is a wavy jagged line. Right underneath the Windows Operating System, separated by a straight line is the Intel Pentium Motherboard.

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