Piggybacking

From Wikipedia, the free encyclopedia

Piggybacking may refer to:

• Piggy-back (transportation), something that is riding on the back of something else
  • Autorack, transporting cars on trains
• Piggybacking (security), occurs when an authorized person allows (intentionally or unintentionally) others to pass through a secure door, negating the purpose of an access control system such as keypad, pass card or biometric identification scanner
• Splash cymbal piggybacking, mounting a cymbal on top of an already stand mounted cymbal
• Seasoned trade line, strangers with bad credit using someone with good credit's credit card account
• Piggyback plant, Tolmiea menziesii
• Piggy-back (law), shareholder selling rights

Telecommunications

• Piggybacking (data transmission), a bi-directional data transmission technique in network layer
• Piggybacking (internet access), obtaining wi-fi access by bringing one's own computer within the range of another subscriber's service
• Multiplexing, multiple signals combined into one

Other

• Piggyback circuit breaker, a double-switch that fits in a single slot in a breaker panel. This is only if they are side-by-side in the same unit — it does not count single half-height units which share a slot. Both are used when a panel has run out of slots, but can still accept the current. The piggyback breaker has two separate outputs, one for each circuit
• Piggybacked contact lens, using a smaller, rigid contact lens on top of a larger, soft contact lens for clinical reasons
• Piggybacking (intravenous therapy), a second infusion set onto the same line
• Piggyback marketing, used to reduce risk, and more established companies can leverage the brand and market reach of a partner to help them very quickly pick up the credibility and awareness needed in new market segments
• Piggyback registration, when owners of restricted stock in a public company are allowed to participate in a public offering underwritten by another party