Microsoft Visio is a very great software to realize professional drawings for any of your text documents or slideshow presentations.
It comes with loads and loads of free templates, in order to draw mechanical, electrical and process engineering elements, from motors to transistors, but also flowcharts, maps, floor plans, and basic charts and graphs.
You can also create your own customized shapes, by providing connectors, connection points and text. Several drawing aids are provided, such as snappings, rulers, grids and object keypoints.
Indeed Visio is the best choice to create drawings for official and business documents.