You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.
Example: 	Optical mice use an LED and a camera to rapidly
capture images of the surface beneath the mouse.
The infomation from the camera is analyzed by a
DSP (Digital Signal Processor) and used to detect
imperfections in the underlying surface and
determine motion. Some materials, such as glass,
mirrors or other very shiny, uniform surfaces
interfere with the ability of the DSP to
accurately analyze the surface beneath the mouse.
\nSince glass is transparent and very uniform, the
mouse is unable to pick up enough imperfections in
the underlying surface to determine motion.
Mirrored surfaces are also a problem, since they
constantly reflect back the same image, causing
the DSP not to recognize motion properly. When the
system is unable to see surface changes associated
with movement, the mouse will not work properly.
Example solution: 4
Example explanation: The passage talks about optical mice or mouse throughout which is a part of computer system. Thus, it is correctly classified to "Computers & Internet" 

Problem: I would check with your school to see if they have a existing relationship with a PC manufacturer. Many times colleges get a killer deal when you consider they also include insurance and maintenance for the whole time you are in school. \n\nIf they have no deals or you don't like their deal, then I can recommend a ThinkPad. They are not the latest and greatest technology, but they are solid and easy to get serviced. We have had a few ThinkPads go down, but the local service companies handled the warranty repair without me having to ship the thing in, usually within a day or so. \n\nBut again, I know some Universities that handle repairs in house as well, even giving out loaners while the repair happens, so it's worth it to find out what your school offers.

Solution: 4