Copyright Goodheart-Willcox Co., Inc. Chapter 13 Internet and the World Wide Web 527 ergonomic principles results in a comfortable, effi cient, and safe working environment. Ergonomics can help make reading on a screen more comfortable. There are many types of ergonomic accessories that may improve the comfort of reading on a screen, including wrist rests specially designed chairs, keyboards, and mice and back supports. In addition, Figure 13-12 identifi es actions that can be taken to create a comfortable environment for reading on a screen and help prevent injury or strain to the worker’s body. Using Search Engines A search engine is a software program that looks through massive databases of links and information to try to identify the best matches for the search request. Web-based search engines are powerful tools for locating information on the Internet and World Wide Web. Most modern search engines have natural language processing that makes searching very easy. For example, a question such as what is the boiling point of water can be entered as the search “term.” However, the more specifi c the search phrase, the better the results. For example, a search using the phrase, or string, sports information may return two billion results in about a half second. To optimize the search, be as specifi c as possible. The search for top 2016 fielding percentage narrows the results to around three hundred thousand. This is still too many pages to read. Fortunately, the links are ordered by relevance to the search string. The links near the top are more likely to contain the information than links near the bottom. Figure 13-13 shows a page at espn.go.com that allows the user to select a season and player position to show the fi elding percentage. This was one of the fi rst links in the search results. Key Applications 4.2 Living Online 1.1.2.1.1 Living Online 1.2.8, 6.1.1 Goodheart-Willcox Publisher Figure 13-12. The application of ergonomics helps prevent muscle pain, eyestrain, and headaches caused by improper placement of monitors, desks, and chairs. Ergonomic Workstation Monitor approximately an arm’s length away, top of screen near eye level Knees even with or slightly below hips Feet set flat on floor or footrest Elbow bent 90° or greater GS5 GS4