If 3200 BC is remembered as the time when humanity first crossed the horizon of written history, 2000 AD will be remembered as the time when humanity first crossed the horizon of digital history.
BC/AD is now commonly referred to as BCE/CE, in attempts to remove religious connotation. Before Common Era/Common Era are gaining worldwide popularity as alternatives but for the sake of general knowledge, most books and courses still use the latter. Similar to how the word Hominid no longer strictly encompasses the human species, there is now a new scientific term (Hominin) that hasn't gotten enough traction to replace what's familiar.
