An overhead projector is required to display content on transparencies. A transparency is a thin sheet of plastic in which light is reflected upon to display content.The light source emits light towards the transparency and then the image is displayed on the wall. Usually, this light source comes from below and lights upward and so the content is depicted above or overhead.
The answer is A you’re welcome
The PING command is used to establish connectivity
The OS shell allows access to the operating system services
Perhaps I’m being 5tup1d but I think your describing open source soft in general. Linux and a lot of periphery that runs on Linux is open source so it did play a large role being that it’s not proprietary like Windows and windows adjacent soft.
