Casio AL-1
Illustration — Casio AL-1 operation panel Casio AL-1 is a Casio's relay programmable calculator released in January 1962. It is considered the precusor of the electronic calculator.
Casio AL-1
ブルーノ・プラス · CC BY 4.0
- Field
- programmable calculator
Reference Check
Propose documentary evidence for Casio AL-1. A contribution is never written directly as fact: identity, source, rights and evidence gates still decide.
Sign in to contribute
World of VALÉORINE
Documentary connections
Only confirmed graph relationships appear here. Images are shown only when their identity and reuse rights both pass the documentary gate.
Documentary evidence
Documentary basis
Authority files
wikidata · Q139622290 · wikipedia · Casio AL-1
In this article
History
History
Casio AL-1 was released in January 1962. It was a successor of Casio 301. Its development began after the feedback received from the government and universities about Casio 14-B.
Functionality
Functionality
Casio AL-1 is a relay decimal computer capable of solving the four basic operations (addition, subtraction, multiplication and division) and square root. It was the first calculator to feature the symbol of "√". It was capable of displaying up to 10 digits, and its internal representation of the number was bi-quinary coded decimal. It had two constants that could store a number with value up to 10 digits. The display was made out of nixie tubes. Internally, it used about 500 relays and six resin gears with 60 teeth to perform the calculations. The user could create a program of 6 bits and 58 steps to perform pre-set calculations. It was also possible to substitute the gears to change the calculation procedures. It had the size of 110×113×42 (cm) and the initial cost was of ¥995,000.
Impact
Impact
Casio AL-1 is considered a product that "led to the birth of the electronic calculator thereafter". In 2014, the National Museum of Nature and Science classified it as an essential historical material for science and technology. The Information Processing Society of Japan has also classified it as an information processing technology heritage. The University of Electro-Communications Communications Museum has one Casio AL-1 preserved.
Text attribution
Licensing
Text attribution
Part of the biographical narrative on this page reuses licensed material. Its origin, revision and licence are recorded here.
The biographical narrative on this page is based on the Wikipedia article Casio AL-1, revision 1370005682 (EN edition), by its contributors. VALÉORINE has edited that text and built its own documentary record around it. The reused material is available under CC BY-SA 4.0, and this page's reuse of it is offered under the same licence. Everything else on this page — the chronology, the holdings, the evidence, the plates and the connections — is VALÉORINE's own record. Sources and licences.
References
Citations
References
Each reference names the institution holding it, so a reader may go to the document itself.
reference work
Secondary witnessreference work
Secondary witness
Connections
Knowledge graph
Connections
Each connection was recorded deliberately, with the basis for it kept on the internal record.
Broader subject
1- programmable calculatorTerminology
Established from a fact already recorded on a verified source.
The Encyclopedia exists whether or not anything is for sale. Corrections are recorded rather than overwritten, and every version of this record is kept. Published 16 August 2026.
Elsewhere in Scientific instruments
736 published records in this field, each with its sources named.
- Carnegie telescopeTerminology
- Casio 301Terminology
- Casio 9850 seriesTerminology
- Casio 9860 seriesTerminology
- Casio fx-3650PTerminology
- Casio fx-39Terminology
- Casio FX-502P seriesTerminology
- Casio FX-602P seriesTerminology
Best supported in this field
For owners
Own an object connected with Casio AL-1?
A specialist will read what you send and tell you what the house can establish, what it cannot, and whether the object is suited to sale. There is no charge and no obligation. The object stays with you throughout; nothing is shipped to us unless it is arranged in writing beforehand.