(Source :12A : http://www.google.co.in/search?hl=en&biw=1328&bih=574&q=coiled+hose+pipe&
bav=on.2,or.r_gc.r_pw.r_qf.&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=PpszUOu
aL47rrQeL6YHAAg ; Aug 21, 2012
12B : http://www.google.co.in/search?hl=en&q=Coiled+Electrical+wire&bav=on.2,or.r_gc.r_pw.r_qf.
&biw=1328&bih=574&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=bZ0zULupKI3QrQ
fNsYHoCA ; Aug 21, 2012
12C : http://www.google.co.in/search?hl=en&q=Coiled+Cork+Opener&bav=on.2,or.r_gc.r_pw.r_qf.
&biw=1328&bih=574&um=1&ie=UTF8&tbm=isch&source=og&sa=N&tab=wi&ei=mZ4zUIeTN83tr
Qe4yYCQBA ; Aug. 21, 2012)

Coils are found in nature quite commonly. Coil is frequently applied in design. Coils are a compact form for long things (plate 12A-C). Long things can be stored by coiling them. Climber plants (plate 11B), such as grape plants, cucumbers, and peas, have coiled tendrils that tend to catch onto things to support the climbing plants. In nature the climbing plants has to have some kind of support for support. Using the same principle man has cleverly designed coiled wires to store longer wire in a compact condition, such as rope, electrical wire (plate 12B), hoses (plate 12A), etc. can be stored in compact manner in a smaller area. The word ‘coil’ comes from the French word cuillir, ‘to gather’. Coils behave differently when turned than when pulled; for instance, a corkscrew (plate 12C) when turned will enter inside the cork, and when pulled it pulls out the cork. Coils also act like as springs (plate 11A), when they are both pulled apart and pushed together. Mechanical Coiled Springs are commonly used in many products. Coiling is commonly used for long power cords (plate 12B) for various appliances, such as telephone, computer, etc.