CAD is used to design, develop and optimize products, which can be goods used by end consumers or intermediate goods used in other products. CAD is also extensively used in the design of tools and machinery used in the manufacture of components, and in the drafting and design of all types of buildings, from small residential types (houses) to the largest commercial and industrial structures (hospitals and factories). CAD is mainly used for detailed engineering of 3D models and/or 2D drawings of physical components, but it is also used throughout the engineering process from conceptual design and layout of products, through strength and dynamic analysis of assemblies to definition of manufacturing methods of components. CAD has become an especially important technology, within the scope of Computer Aided technologies, with benefits such as lower product development costs and a greatly shortened design cycle. CAD enables designers to lay out and develop work on screen, print it out and save it for future editing, saving time on their drawings.

The community software is still evolving. The developers dedicated to these softwares are coming up with new and innovative ideas every time. Earlier community softwares only allowed users to chat through text messages, but with constant efforts on development, voice chatting, video conferencing, video and music exchange and sharing have also been made possible through these softwares. The Community software primarily leverages to the web 2.0 model, where interactivity is the prime concern. Many Online communities that follow the web 2.0 style of communication through interent have adopted themselves to the community software tools that help them in better connectivity. Some of the salient community software features that are more commonly used across the web 2.0 communities include, desktop chatting, video conferencing, text messaging (ie. pc to mobile chatting.), scrap exchange, sharing of videos, music files and pictures, sending blog posts and form postings. Viewing and commenting on Online news and participating in different Online groups.

The microscope requires an external light source to illuminate the specimen under viewing. The light can be used at different angles to highlight certain details of the specimen, like bumps or ridges, which are features of rocks or metals. It can also highlight certain angles or corners of the specimen, which pertain to the textile or computer chips and accentuate traits, which can be essential finds in the field of research and development. Slits, filters and gratings can be the other important accessories for the light source. Slits and gratings can dim the light and can also diffuse the light to let it fall at a certain angle or with a certain pattern on the specimen. The engineers will thus make better use of the light and use it in places they require the most. Filters are also used to dim the light, but this is done with different shades and colors. When the microscope is used to study the nature of certain rocks and minerals, filters will find a great use, as the specimens appear different under different shades of light. Thus, filters find a great use as accessory in stereoscopic microscopes.