The Mobile Library at the North Jakarta Administration City Library and Archives Office is a mobile library engaged in learning to increase readers' interest, especially in terms of learning. Where in the process of borrowing and returning books in the mobile library is still not well computerized and some processes are still done by hand and stored in catalog books. So that unorganized data is difficult to find, is often lost and makes it difficult for administrators to prepare reports. From the existing problems the writer designed and built a mobile library information system which is expected to be able to handle these problems. In looking for needs, system development is carried out through data collection methods by observation. In the system development method, the authors use object-oriented development methods with tools using the Unified Modeling Language (UML) in system analysis and design. Researchers use the PHP and MYSQL programming languages ​​as the database. It is hoped that with this mobile library information system, the processes involved in borrowing and returning books will be easier, because this mobile library information system can be accessed multi-user.

4G-LTE has become game changer in the GSM era especially in a developing country which has limited connectivity to the internet world. Having this limited capability, several rural areas in Indonesia has been suffered of its internet connection need. They need to visit nearest city just to used better internet connection. Facing industry 4.0 era, it is normal to have internet connection everywhere that supports industrial activities from all levels ranging from home industry to heavy industry, to win the competitive market. The people should get sufficient internet connection to support their daily activity. Nowadays, with COVID-19 pandemic has transformed all human being to adapt this fast-growing technology, just to survive from the pandemic. What was on site activity now has become remotely conducted activity (mostly using internet connection). 4G-LTE technology that is widely available for telecommunication in Indonesia, should also adopted to support daily activity during and beyond pandemic situation. This study employs common telecommunication devices combined with networking devices targeted to achieve the same utilization of the devices when implemented in most common places like offices in major cities, that in the end brings internet connection to places where usually no internet connection or blank spots occurred in rural areas.

Auto 2000 Ciledug is a company that sells various types of Toyota cars that are already competing in the global market. Through dialogue with those who use Toyota products, the company continues to acquire new knowledge and incorporate it into product development by contributing through product and service innovation, optimizing various work procedures at Car Dealers. With this information system, it is hoped that it will simplify and speed up the car sales process at Auto 2000 Ciledug. Such as, can access online applications, can place car orders, can simplify data management to produce reports. In the current Auto 2000 Ciledug running system, there are problems such as the application used cannot be ordered online. From the entire system that the author has created, it can be concluded that, with this information system, it is expected to simplify and accelerate the car sales process at Auto 2000 Ciledug, such as data management to report creation. This system is still not perfect, because there are still several processes that must be added, such as the process if the car is damaged / lost and the accounting process (financial calculations).