Z23 (computer)

{{short description|Transistorized computer delivered from 1961 to 1967}}

{{Infobox information appliance

| name = Z23

| title =

| aka =

| logo =

| image = Zuse Z23 (2102310445).jpg

| caption = The Zuse Z23

| developer = Konrad Zuse

| manufacturer = Zuse KG

| family =

| type =

| generation =

| releasedate = {{Start date and age|1961}}

| lifespan = 6 years

| price = {{DM|200000|1961|link=yes}}

| discontinued =

| unitssold = 98

| unitsshipped =

| media =

| os =

| power = 4000 watts

| soc =

| cpu = 2700 transistors and 7700 diodes

| CPUspeed = 150 kHz

| memory = 8192 word drum memory as main storage, with 256 words of rapid-access ferrite memory

| storage =

| memory card =

| display =

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| dimensions =

| weight = {{convert|1000|kg|MT ST}}

| topgame =

| compatibility=

| predecessor = Z22

| successor =

| related = Z25, Z26

| website =

}}

The Zuse Z23 was a transistorized computer first delivered in 1961, designed by the Zuse KG company. A total of 98 units were sold to commercial and academic customers up until 1967. It had a 40-bit word length and used an 8192 word drum memory as main storage, with 256 words of rapid-access ferrite memory. It operated on fixed and floating-point binary numbers. Fixed-point addition took 0.3 milliseconds, a fixed point multiplication took 10.3 milliseconds. It was similar in internal design to the earlier vacuum tube Z22. Related variants were the Z25 and Z26 models.Stephen H. Kaisler, Birthing the Computer: From Relays to Vacuum Tubes, Cambridge Scholars Publishing, 2016 {{ISBN|1443896314}}, page 21

The Z23 used about 2700 transistors and 7700 diodes. Memory was magnetic-core memory.Hans Dieter Hellige, ed. (2004). Geschichten der Informatik. Visionen, Paradigmen, Leitmotive (in German). Berlin: Springer. p. 128. {{ISBN|3-540-00217-0}}. The Z23 had an Algol 60 compiler. It had a basic clock speed of 150 kHz and consumed about 4000 watts of electric power. An improved version Z23V was released in 1965, with expanded memory and a higher processing speed.

The Z23 weighed about {{convert|1000|kg|MT ST}}.{{cite web |title=Z23 |url=http://www.horst-zuse.homepage.t-online.de/Konrad_Zuse_index_english_html/rechner_z23.html |website=www.horst-zuse.homepage.t-online.de |language=en}}