referências

 

•http://gabriellymororo.blogspot.pt/2011_04_01_archive.html

•http://www.fundacaobradesco.org.br/vv-apostilas/mic_pag3.htm

•http://www.infoescola.com/informatica/mouse/

•http://ticticliliana.blogspot.pt/2011/09/o-primeiro-rato-do-mundo.html

•http://vas-y.com/dicas/historia/cap2_1.htm