A Möbius strip is a one-sided 3-D object. Very roughly a surface is orientable if it has two sides so that, for example, is it possible to paint it with two different colors. A sheet of paper or the surface of a sphere is examples of orientable surfaces. A Möbius strip is a non-orientable surface: you can build one with a strip of paper (twist the strip and glue end together to form a ring) and verify that it has only one side: it is not possible to paint it with two colours.  In power-transmission belt the half-twist in the belt is intended to make the belt last longer and wear more evenly.

Plate 20A Made from Recycle Material	20B Recycle Symbols	20C Automobile Belt

(Source : http://www.google.co.in/search?hl=en&q=M%C3%B6bius+Strip&btnK=&um=1&ie=UTF8&
tbm=isch&source=og&sa=N&tab=wi&ei=HoceUKyfDYHKrAfg3YDABg&biw=1328&bih=574&sei=s4c
eUJ7rC4firAe7oYDABg#um=1&hl=en&tbm=isch&sa=1&q=M%C3%B6bius+Strip+symbols&oq=M%
C3%B6bius+Strip+symbols&gs_l=img.12...170897.174127.0.175922.8.8.0.0.0.0.0.0..0.0.ckwcph..0
.0...1.J1qtkdOX4L4&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=c63cd7b6e11001e5&biw=1328&bih=
574 ; Aug 5, 2012)

The International Recycling Symbol (Plate 20A & B), designed by Gary Anderson is based on a Möbius Strip. It has inspired large number of creative people to innovate new concepts and product design. Automobile engine belt (plate 20C) is designed based on the same principle.

Assignment #01: Design four different furniture sets for studies based on Möbius principle.