A lace card is a
punched card
A punched card (also punch card or punched-card) is a piece of stiff paper that holds digital data represented by the presence or absence of holes in predefined positions. Punched cards were once common in data processing applications or to di ...
with all holes punched (also called a
whoopee card,
ventilator
A ventilator is a piece of medical technology that provides mechanical ventilation by moving breathable air into and out of the lungs, to deliver breaths to a patient who is physically unable to breathe, or breathing insufficiently. Ventilators ...
card,
flyswatter
A fly-killing device is used for pest control of flying insects, such as houseflies, wasps, moths, gnats, and mosquitoes.
Flyswatter
A flyswatter (or fly-swat, fly swatter) usually consists of a small rectangular or round sheet of some across ...
card, or
IBM doily
A doily (also doiley, doilie, doyly, doyley) is an ornamental mat, typically made of paper or fabric, and variously used for protecting surfaces or binding flowers, in food service presentation, or as a head covering or clothing ornamentatio ...
). They were mainly used as practical jokes to cause disruption in
card readers. Card readers tended to jam when a lace card was inserted, as the resulting card had too little structural strength to avoid buckling inside the mechanism. Card punches could also jam trying to produce cards with all holes punched, owing to power-supply problems. When a lace card was fed through the reader, a
card knife Card or The Card may refer to:
* Various types of plastic cards:
**By type
***Magnetic stripe card
***Chip card
*** Digital card
**By function
***Payment card
****Credit card
****Debit card
****EC-card
****Identity card
****European Health Insuranc ...
or
card saw Card or The Card may refer to:
* Various types of plastic cards:
**By type
***Magnetic stripe card
*** Chip card
*** Digital card
**By function
***Payment card
****Credit card
**** Debit card
****EC-card
****Identity card
****European Health Insur ...
(a flat tool used with punched card readers and card punches) was needed to clear the jam.
See also
*
Black fax
The term black fax refers to a prank fax transmission, consisting of one or more pages entirely filled with a uniform black tone. The sender's intention is generally to use up as much of the recipient's fax ink, toner, or thermal paper as possible, ...
*
Christmas tree packet
In information technology, a Christmas tree packet is a packet with every single option set for whatever protocol is in use.
Background
The term derives from a fanciful image of each little option bit in a header being represented by a differen ...
*
Denial of service
In computing, a denial-of-service attack (DoS attack) is a cyber-attack in which the perpetrator seeks to make a machine or network resource unavailable to its intended users by temporarily or indefinitely disrupting services of a host connect ...
*
List of practical joke topics
This is a list of practical joke topics (also known as a prank, gag, jape or shenanigan) which are mischievous tricks or jokes played on someone, typically causing the victim to experience embarrassment, perplexity, confusion, or discomfort.
Pra ...
Notes
*
References
Punched card
Practical joke devices
Denial-of-service attacks
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