What is Millenium?

The term 'Millennium' (with two 'n's) generally refers to a period of one thousand years. Without further context, it's difficult to define it as a specific technology. It is commonly used to denote the beginning of a new era or significant technological advancements that occurred around the turn of the millennium (around the year 2000). For example, the rise of the internet and mobile computing could be considered technologies associated with a millennium.