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'.
One 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.

Since 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.
Solution is here: 4
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"

Now, solve this: Surround yourself with friends, family, people who love you. Go on a trip to clear your head. It doesn't have to be expensive, just go camping with some pals or take a day trip to a beautiful outdoor spot. Take up a new hobby. Now is the perfect time to start doing something you didn't have time for before. Exercise. Read humorous and uplifting books (NO romance novels!). Go to the movies (NO sequels to movies you saw with your ex!). Buy fresh fruits and vegetables and make a delicious homecooked meal for your best friends. Get out in the world, get some fresh air, stretch your legs. Take some time to get to know yourself and figure out what you want in life.
Whatever you do, DON'T wallow in self-pity at home. DON'T get drunk and call your ex! DON'T write your ex emails begging to take you back. DON'T hang out in front of your ex's house hoping to bump into him/her. DON'T jump into another relationship right away.
Solution:
8