These devices are designed to operate in full duplex, which allows them to send and receive signals at the same time. They don't need to wait until one device has finished communicating for the other device to start communicating. Mobile computers use a significant change in system and application software. These operating environments offer features ranging from an essential DOS environment with a graphically enhanced pen to the powerful capabilities of Windows NT. Importance of mobile computing in business1. In businesses: Managers can use mobile computers, for example, for difficult presentations to key clients. They can access the latest market share information. In depth, they can revise the presentation to take advantage of this information. They can communicate with the office about possible new offerings and hold conference calls to discuss responses to the new idea. Mobile computers can therefore benefit from competitive advantages. 2. Cloud Computing:- This service is offered to save documents on an online server and can contact them anytime and anywhere when you have an internet connection and can access these files on multiple mobile devices or even on PCs at home. Most of these SaaS applications have web services APIs and most data on the cloud is consumed via the web.