This led to MSI (medium scale integration) chips containing simple components, such as full adders, made up of multiple gates.

An additional 1,100 small scale integration (SSI) and medium scale integration (MSI) ECL logic devices were used.

The instrument, named the SAL-MAR CONSTRUCTION, is a hybrid system in which TTL logical circuits (small and medium scale integration) drive analog modules, such as voltage-controlled oscillators, amplifiers and filters.

Fairchild Semiconductor provided the medium-scale integration (MSI) chips used throughout the system.

The ND-100 was implemented using medium-scale integration (MSI) logic and bit-slice processors.

The original 20 and 24-pin PALs were denoted by MMI as medium-scale integration (MSI) devices.

The next step in the development of integrated circuits, taken in the late 1960s, introduced devices which contained hundreds of transistors on each chip, called "medium-scale integration" (MSI).

Now known retrospectively as small-scale integration (SSI), improvements in technique led to devices with hundreds of logic gates, known as medium-scale integration (MSI).

It was first to employ medium-scale integration (MSI) circuits from Fairchild Semiconductor, with subsequent models using large-scale integrated (LSI) circuits.

Doug Tougaw's contribution to the field of has focused on the building of medium-scale integration components such as full-adders from basic QCA gates as well as fault-tolerance studies of QCA wires.

The machine used diode-transistor logic, the lowest power parts available at the time on the preferred parts list; initially fabricated from 1700 SSI (NOR gate) packages, it was later moved to 69 MSI (medium-scale integration) chips.