As for cross country skiers, professional racers average 15 miles per hour for continuous distances up 35 miles. Most top ski racers hit about 20 - 25 miles per hour on the flats, and 35 - 40 miles per hour on the downhills. Recreational cross country skiers tend to clock out at around 7-10 miles per hour.
adware (Noun). A software application that includes advertisements, which are displayed while the software is running. Developers use adware as a source of income and to keep the costs of the software down (usually making it free). Some adware programs can include spyware.
Commercial software is software being developed by a business which aims to make money from the use of the software. In most of cases it is a demonstrational copy released by the manufacturer to entice customers to buy their product. A commercial demo will usually only work for a short period of time and/or have certain functions disabled. Spyware: Spyware is software that hides itself somewhere on your computer monitoring the behaviour of your activity on the web and passing this information on to advertisers. Spyware is often installed onto your PC when you download and install other software published as Freeware or as Adware.