One of the primary consequences of the railroad in the United States was the creation of a system by which goods could easily be moved east to west, opening new sections up that were previously only accessible by horse or on foot.
The answer is Linux is an example of a popular open source operating system. The Linux open-source operating system, or Linux OS, is a generously distributable, cross-platform operating system based on Unix that can be installed on PCs, laptops, netbooks, mobile and video game consoles, servers, supercomputers and tablet devices.
The answer is neurotic trend of "moving toward people".
There are three principle neurotic trends as depicted by Karen Homey, which develop from a people system of engaging nervousness.The trends are:
Moving Toward People
Moving Against People
Moving Away From People
Because mobile apps are exposed to viruses and they can take over your mobile device opening it up to malicious people who want your goodies