By using digital technology such as mobile devices and laptops, we can make friends. We can be connected with people who live far away from us and with well-known public figures who we cannot meet. Recently many community websites have been generated offering both online conversation programs and offline gatherings, so we can be connected with various people having the same interests or even different tastes. For example, some meet-up events on websites generate offline gatherings. At first attendees get to know each other just as strangers online, but they can be more friendly via offline events. Also we can become a friend easily with well-known people on the Facebook or Linkedin and we can learn knowledge or useful information from them. Second, digital technology can make business more productive and can increase efficiency in work environment. Digital technology enables to save time at work. For example, we can deliver heavy files via digital software such as dropbox to other people or to business partners more easily and faster than before. Also, due to digital technology, the working environment has been improved. Many working moms who have trouble handling both work and baby care can work at home via e-mail or teleconference. They can spend their time flexibly at home without break their career. Third, digital technology offers many education opportunities to learn various fields easily. Furthermore some education programs based on digital platform provide it for free and technology can increase efficiency and reduce inequality in education. For example, we can learn language via Skype, not by attending classroom. Some website offers language exchange programs as connecting with many various language speakers in globe for free. As another example of efficiency, I want to mention e-book. Through just one e-book device we can access more than 1,000 books. Also, we can be accessible to professional education programs such as M