Are you sure it's not too long. They asked you not to exceed a page and they even said please! :-)
Hahah :) It actually all fits on one page, so no worries on that part :)
it would be good to add a sentence at the end of the first paragraph that tells the reader the single most important message of the essay, the idea you want them to associate with you.
Hmmm... how about:
"Hello World! I was eight years old when I discovered the realm of computer science. Ever since I found my passion for programming, I had strived to understand the logic behind algorithms and code. I loved to translate the problems I encountered daily into C++ programs and Java applets, and I relished the tingling sensation whenever I witnessed my creations being applied to the real world. Programming and computer science is, to me, the ultimate source of delight and inspiration to serve the world."
I think the last sentence encapsulates the joy I find in programming itself and in using my programs to help others.
Renowned scientists such as William Scherlis can teach me the essentials of economical programming necessary for the making and marketing of my future products. ---this is just name dropping. To make it meaningful you should cite an article he wrote or refer to research he is doing or his area of specialization.
Yeahh... I thought it was a bit sudden. What if I added a short description of where I learned about him :
"In this way, I want to continue to serve the people. At Carnegie Mellon, I can not only broaden my expertise in algorithmics but also learn from its leading professors to apply my newly acquired knowledge to reality. Renowned scientists such as William Scherlis, who was featured in an article on software management and development in my favorite magazine ComputerWorld, can teach me the essentials of economical programming necessary for the making and marketing of my future products. "
Again, thanks a lot! :)