SpotHistory - Platinum. In general, a chart is a graphical representation of data. Charts allow users to see what the results of data to better understand and predict current and future data. The picture below contains an example of a column chart displaying the number of unique visitors Computer Hope has received between the years of 2000 and 2006. In this example, you'll notice a gentle increase of users without reading any data. A flowchart is a graphical representation of decisions and their results mapped out in individual shapes that were first developed by Herman Goldstine and John von Neumann in the 1940s. Flowcharts can provide a step-by-step diagram for mapping out complex situations, such as programming code or troubleshooting problems with a computer. To the right, is an image from Microsoft Visio, a popular program used to design and create flowcharts and diagrams. Below is an example of a basic flowchart created in Visio that gives a good representation of their layout. As can be seen, you have several steps that may be followed systematically to help determine the cause of computer problem. Of course, this is an example and not the full set of steps required to troubleshoot computer issues. Not to be confused with a chart, a graph (/graf/) is a representation of connected values in a multidimensional space. Graphs are useful for analyzing the various connections between individual units of data. In mathematics, graphs are an important computational tool. Graph values are called nodes, and their connections are called edges. Graphs may be "directed" (traversal between nodes can happen only in one direction) or "undirected" (either direction may be traversed from node to node). Undirected graph. Graphs have important applications in networking, search engines, social network analysis, and recommendation systems, such as those used by Amazon, Netflix, Pandora, Spotify, and YouTube. One of the most famous graph analysis algorithms is PageRank, which is used by Google to generate search results. The scientific study of graphs and their analysis is called graph theory.