Every business uses technology and computers to do business every day. Proficiency in this area is a must for the person expecting to work in an office or professional setting. Certification in this area may be valuable for a population not usually considered adept at high-tech systems such as senior citizens that are working into the later years of their lives. Computer skills certifications prove to employers that graduates can handle the tasks needed to be efficient effective employees. Testing areas include Windows skills, MS Word, MS Powerpoint, MS Excel, DOS, and general computer skills.