LSI-11 OEM QBus system. Digital sold processor boards to OEM's so they could build PDP11 compliant systems. The processor board was provided by Digital Equipment Corporation while the backplane, Memory cards, serial interface cards and disk subsystems were provided by other manufacturers (Plessey, MDE, Data Systems Design).
The system on display is distributed by Positronika Data Systems in the Netherlands.
A comparable Digital system would be called PDP11/03.
The system contains the original Quad Height CPU board (type M7264) with on board 8 KByte memory, which is rather unique, since it was Digital's first endeaver in building systems with LSI (Large Scale System Intergration) integrated circuits.

Electronic ring counters are the counterpart of mechanical counter wheels. Relays driving the counter wheels are replaced by vacuuum tubes (also named thermionic valves). The concept is developed by Eckert and Mauchly in the ENIAC, the first electronic computer operational in 1945 and completed in 1946. The use of electronic techniques increased operating speed enormously. Like counter wheels, numbers are stored in decimal form. The ring counter contains 10 vacuum tubes, one of which conducts current at any time. Pulses enable the next vacuum tube to become active. In this way the unit counts pulses from 0 to 9, indicating a carry when it switches from 9 to 0. The ENIAC had in total 20 accumulators consisting of 10 such ring counters. The use of termionic tubes as switching elements became common practice in early computers. In 1950 Eckert and Mauchly build the UNIVAC, the first commercial computer in the US. They started their own company, the Eckert-Mauchly Computer Corporation, later on acquired by Remington Rand. The unit shown, holding ten gas-filled 2050 triode tubes, is a decimal ring counter as used in the first Univac computer. It connects to the computer's circuitry by means of 26 silvered conical 'pins'.

Punch cards are selected mechanically by vibrating a card deck while some subset is fixed by needles. Used in libraries in the pre-computer era. Capacity up to 7000 titles.

Head of a 14-inch Fixed HD Drive converted into a linear servo actuator by Ed Droog for a biomedical application (?)

Intel 8085 development system. To be used with ISIS-II operating system.

In large black suitcase. Connects with SCSI-card in dedicated PC (22-04-15-02).

The LSI-11 was introduced in 1975 as first PDP-11 model using large integration. The entire CPU is contained in 4 LSI chips on a dual, quad board. In fact the LSI-11 can be considered as a microprocessor with additional on board functionality, such as micro debugging, I/O support and booting from disk. It uses a simpler variant of the Unibus called QBUS with multiplexed address and data wires.

The PDP-8 (Programmed Data Processor) became in 1964 the first succesful minicomputer by the Digital Equipment Corporation.
It was part of the PDP-1 - PDP-15 series built between 1957 and 1977.
The here exhibited PDP-8 with serial nr. 7 is the first computer from the Electrical Engineering faculty of the THT. It was purchased end of 1967 for HFL 100.000. In 1967 the value of the dollar to the dutch guilder was 3.59 to 1. The basic price of the PDP-8 was USD 18.000 (without options).
From 1967 until 1972 it was in service as faculty computer and mainly used by the former departments Netwerk Informatie Communicatie en Systeemtheorie (Poortvliet/Groneveld) and Bio-Informatica in the EL-TN gebouw (now UPark building). From 1972 until 1974 this PDP-8 was the departmental computer of the EL department Bio-Informatica. The total operation hours of this computer is 8853.

Single 19-inch rack of the 100-node multiprocessor machine

The video game system is based on the Signetics 2650 microprocesssor. While playing a video game the player communicates using the keypads and joysticks. To use the hobby module for programming video games (see link) the keypads are used in a different way: they are placed side by side and used as a single keyboard.

Patent 3094786

aangeschaft door H. Tattje

Self-construction box with 4 transputer emulation boards.

Tumult-15 is a modular multiprocessor system consisting of 15 processing elements build as research project in the 1980s. The processing elements are connected through a communication network using a unidirectional ring topology. Each processing element can contain one or more Motorola M68000 processor boards, all connected through a VME bus. The hardware is controlled by a distributed real-time operating system, written in modular Pascal and Modula-2.
A more advanced successor system with 64 processing elements has been developed in coöperation with the Dutch PTT to automatically recognize handwritten giro cards.