A sebaceous cyst is a type of cyst that forms in the epidermis, the outermost layer of the skin. A sebaceous cyst is also sometimes called an epidermal cyst. It forms when a sebaceous gland, an oil-producing gland in the skin, becomes blocked.
A technique involving using chalk to place a special symbol on a sidewalk or another surface to indicate a nearby wireless network that offes Internet access. Wardriving A technique hackes use to locate insecure wireless networks while driving around. Warflying A technique hackers use to locate insecure wireless networks while flying around. Smartphone A cellular phone with the features of a personal digital assistant.
Save. A GPS tracker is a device used to track the location of a vehicle. There are two types of trackers available to the public: a logger tracking system and a real-time tracking system. A logger tracking system remembers all the locations a vehicle has been and stores them on a hard drive. It's illegal to block or tamper with any GPS tracking device that has been placed in a vehicle for law enforcement reasons. 2  If you're not sure about a tracking device attached to your car, consult your local law enforcement. 3  GPS blockers are illegal in some areas; check your local laws before buying and using one.