Forearm crutches, also known as Canadian or Lofstrand crutches (Figure 7), are used for patients requiring bilateral upper-extremity support with occasional weight bearing. An advantage of forearm crutches is that they allow the hands to be free without disengaging the crutch from the forearm.
10-animal cloning. Dolly the sheep was the first animal to be cloned from the cell of an adult animal. http://www.ornl.gov/sci/techresources/Human_Genome/elsi/cloning.shtml.
A program called Elk Cloner was the first personal computer virus to appear in the wild-that is, outside the single computer or lab where it was created. Written in 1981 by Richard Skrenta it attached itself to the Apple Dos 3.3 operating system and spread via Floppy Disk.he first academic work on the theory of computer viruses (although t â¦ he term computer virus was not used at that time) was done in 1949 by John Von Neumann who held lectures at the University of Illinois about the Theory and Organization of Complicated Automata.