Not sure what you are asking. We need to know for what.
DOS is not used at any time in any modern operating system.
Yes, "modern" is indeed an adjective. It is used to describe something that is current, up-to-date, or characteristic of the present time.
from along time ago people used to die.
Of or pertaining to the present time, or time not long past; late; not ancient or remote in past time; of recent period; as, modern days, ages, or time; modern authors; modern fashions; modern taste; modern practice., New and common; trite; commonplace., A person of modern times; -- opposed to ancient.
It is the present time not the modern time because if it was the modern time it would be a long, long time ago.
It was called Tyburn at the time that it was used for public hangings. Its modern name is Marble Arch and it is located at the western end of Oxford Street.
Most historians considered them just for the time. It was the first coded set of laws we know of. Civilizations got used to more modern laws at the time.
The term Middle Ages was not a compliment. The term Middle Ages was used to label the time between the Roman Empire and the modern age. The idea was that in the modern age, Europe had recovered from a time of low culture.
"nowadays" is an adverb that refers to the current time or present period. It is used to describe something that is happening in the modern era or recent times.
Theclock helped a LOT withstayingon time and knowing what time it is and knowing the time is important. They used to use Sun Dials but some people hadtroublewith it
Neon was used in the modern time for vacuum tubes, television tubes, lasers
Genocide is the modern term used.