Graphite encased in wood, it became what we know as a pencil, today the most common drawing medium of all. With that being said the answer is graphite pencil.
create a twin server, then you're good to go
The most popular form of Non-volatile "Secondary" storage is the humble hard drive. USB solid-state "Thumb" drives are also Non-volatile storage
Gaucher (pronounced go-shay) disease is the most common of the lipid storage disorders.
The Flash Drive.