1 VGA - VGA is an analog output, and was most common in the CRT-era of computer displays. It has largely been phased out of any recent hardware, but you may encounter it with older computers or CRT monitors.  DisplayPort - This is a digital connection, similar to HDMI.
There is evidence that iron was known from before 5000 BCE. The oldest known iron objects used by humans are some beads of meteoric iron, made in Egypt in about 4000 BCE. The discovery of smelting around 3000 BCE led to the start of the iron age around 1200 BCE and the prominent use of iron for tools and weapons.
1 Iron is an element that has been known in its pure form for at least 5,000 years. 2  The name iron comes from the Anglo-Saxon word iron and Scandinavian iarn for the metal.ron is one of the elements you encounter in pure form. It is essential for nutrition and used in a variety of household objects. Here are some quick facts about iron. You can find detailed information about iron on the iron facts page.