Original sentence: Almost universally adopted in modern computers , these graphical interfaces are designed to assist the user in easily accessing and configuring (or modifying) the most important (or frequently accessed) specific OS packed features, yet it is not meant to give access to the whole vast feature set found in an OS, reason for which the traditional, yet more complicated and less intuitive, command-line interface (CLI) is still in use when full control over the OS is required
Edited sentence: Almost universally adopted in modern computers , these graphical interfaces are designed to assist the user in easily accessing and configuring (or modifying) the most important (or frequently accessed) specific Operating System (OS) packed features, yet it is not meant to give access to the whole vast feature set found in an OS, reason for which the traditional, yet more complicated and less intuitive, command-line interface (CLI) is still in use when full control over the OS is required