Nowadays it is very popular to store pictures in an electronic form, as computer files. Undoubtedly this way has lots of benefits compare to keeping "hard copies" of photos, drawings etc: an electronic picture does not take so much space (a regular recordable CD-R disc can hold as much as about 5000 photos in JPEG format of quite good quality), it can be easily duplicated, shown and even presented to all of your and others' relatives, pals and enemies
Cabri 3D Software Overview
Create personalized fractals for beautiful wallpapers
Take the stars with you wherever you go
Limix Suite: Diverse Educational Tools
A free program for Windows, by HiRISE.
Solution Calculator provides lab-ready directions how to prepare a certain volume of solution.
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