computer science and engineering

hello friends hm aapko is blog ke jriye computer science ki sari languages ke bare me btayege ki computer science me kitni programming language hoti he or vo kya kya kam krti he or hm use kese use kr skte he or use kese sikh skte he hm isme aapko c, c++,java , php, python , mysql,etc. languages ke bare me btayege