DMA Channel
the very basic os --MS-DOS allows uers to directly have access to hardware
direct memory access (DMA)
i finnally freackin found it, real mode(16 bit) allows access to all hardware resources, where protected mode(32 bit) controls how the application accesses the hardware. In real-mode, an application has complete access to all hardware resources. This "open door" policy can create problems when applications make conflicting commands to the hardware. In protected mode and long mode, the OS controls how an application can access hardware.page 53 in CompTIA A+ Guide to Managing & Maintaining Your PC, Sixth Edition by Jean Andrews
Hardware
Ftp
The Remote Access technology allows you to access the resources of a particular computer from another, over the internet.
Kernel mode and user mode are two distinct operating modes in a computer's architecture. Kernel mode allows code to execute with full access to hardware and system resources, enabling it to perform critical tasks like managing memory and hardware devices. In contrast, user mode restricts applications from directly accessing hardware and system resources, providing a controlled environment for running user applications to prevent them from interfering with each other or the operating system. This separation enhances system stability and security.
You can access Google's online web application which allows you to directly access Google's online dictionary and find the definitions of all words in the dictionary.
The Remote Access technology allows you to access the resources of a particular computer from another, over the Internet.
Extranet
The networking functions of a computer allow it to access these shared resources.
Workstation Service