Bad contacts between metallic parts can be caused by corrosion, dust or dry pollution. Other factors causing miscontact are vibrations due to wind, insufficient mechanical loading and the changes in dimensions due to temperature variations.

The logical complement of 0xAAAA is 0x5555 on a 16-bit machine, and 0xFFFF5555 on a 32-bit machine.

Still, doing something to protect your cat is better than doing nothing, so you should have your cat microchipped in the groin area with a registered ID.

[…] comets. Depending on their orbital period, comets are classified as short or long period comets. Short period comets have periods less than 200 years. For example, Halley's Comet is a short period comet, because it has a period of 76 years.