This original Japanese soroban can be used to calculate numbers with up to 23 digits. Size 34 x 6.5 cm.

This medium-sized Japanese soroban can be used to calculate numbers up to 9,999,999,999,999. (19,5×6,1cm)

This 3-digit Japanese soroban can certainly be used as a children's rattle, but you can also calculate with it.

A special kind of mechanical multiplication calculator.

With this easy-to-build cryptography disk and a little practice, you can encrypt secret messages and, if you know the code, decode them again. The...

The cup with the four-colored Arithmeum logo is 10.5 cm high and has a diameter of 7 cm.

The “Routing Bert blue” cup shows a section of the Southbridge of an Apple Power Mac G5.

The “Routing Bert red” cup shows a section of the Southbridge of an Apple Power Mac G5.

Memory Game with various photographs of the "Arithmaurel" calculating machine.

The silk cloth with the motif “Cyrus” shows the clock chip of the Monet series [IBM S/390 -CMOS5X- Technoloy] on 40×40 cm.

The silk cloth with the motif “Nina” shows the level 2 cache chip of the Monet series [IBM S/390] on 90×90 cm.

The silk cloth with the motif “Philipp” shows the placement of an IBM chip on 40×40 cm.

The silk cloth with the motif “Patrick” shows a 90×90 cm section of a chip from IBM's Summit supercomputer.

First day sheet of the special stamp of the calculating machine by Johann Christoph Schuster (1759-1823).

Original multiplication rods according to Napier, paperback, original Germany 1905, reprint.

The tote bag with four-color Arithmeum logo has an edge length of 40×37cm. The long straps make it ideal as a shoulder bag.

Voucher for a guided tour of one of the exhibitions in the Arithmeum.
We will be happy to advise you on the content and dates!