Historic internal storage media In the following some types of
memory are described which are found in the computers on display
at the technikum29. These devices may be classified as either
RAM (random access memory) or ROM (read only memory). Due to
their respective size these are very demonstrative examples. The
problem of storing information is of central importance for
digital computers and was a difficult area during the early days
of computing. In these times building a fast processor was
considerably more easy than building an equally fast and large
memory system for this processor. This led to some rather arcane
solutions which are completely extinct today. Nowadays as well
as 50 years ago, these characteristical attributes are
important: - cycle time - packing density - costs / bit -
(thermal) power loss Storages are classified geometrically: -
one-dimensional alignment (e.g. the delay line memory) - two-
dimensional alignment (e.g. drom storage, disk storage) - three-
dimensional alignment (e.g. core