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1527 or 1146 or 374. — to —. 阴金蛇年. (female Iron- Snake) 1528 or 1147 or 375. Year 1401 ( MCDI) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar .
- The World According to Punched Cards
- So What Is A Computer Anyway?
- What, No Touch Screen?
- But Where Did Punched Cards Come from?
- So What’s Interesting About The 1401 computer?
- In Conclusion
- For Further Reading
By the time the 1401 was introduced, electromechanical systems based on punched cards were widely used to manage business operations. These large and unwieldy machines — sorters, collators, punched card calculators and tabulators – each had unique functions and were used together to solve large-scale business problems. For example, inventory manage...
Just about every recent electronic computer has a similar block diagram if you stand far enough back: There are only three major sections: 1. The Central Processing Unit (CPU) is the part that actually computes things… CPUs can add, subtract, sometimes multiply and occasionally divide, plus perform a host of other operations like copying and compar...
Of course any computer’s I/O devices are critical, as that’s where programs and data go in, and answers come out. While many I/O devices were added during the 1401 family’s lifetime, the machine started out with only three: 1. As noted, punched cards were critical to data processing using tabulating machines long before what we’d recognize as progr...
The 1401 doesn’t have a keyboard or display, so how would all that important business data get into the computer in the first place? The 1401 could read the data from punched cards, but where did they come from? For that, there’s another machine in the CHM lab, called a keypunch, where data entry operators could type in the data, one card at a time...
For those of us interested in how computers work, the 1401 fits into a transitional phase in the development of modern computers. Many characteristics are still very familiar, but some are quite different because of the focus on the “unit record”1 one-punched-card-at-a-time paradigm. As shown above, the machine’s internal architecture lines up well...
The 1401 was certainly not the biggest computer on the block when it was introduced, but the focus on modest cost and compatibility with existing business processes made it a very successful machine. Thousands were sold, and by 1965, half of all computers in the world were of the 1401 family, spawning an entire generation of programmers who first l...
More on punched-card data processing: Principles of Data Processing, William J. Claffey, 1967, Dickenson PublishingThe 1401 System would consist of three components — a central processing unit that controlled all computational functions, an input/output device known as the 1402 Card Read-Punch that could read up to 800 punched cards per minute and punch 250 cards per minute, and the high-speed 1403 printer that could print 600 lines of text per minute.
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Catherine of Valois or Catherine of France (27 October 1401 – 3 January 1437) was Queen of England from 1420 until 1422. A daughter of King Charles VI of France, she married King Henry V of England [1] and was the mother of King Henry VI. [a] Catherine's marriage was part of a plan to eventually place Henry V on the throne of France, and ...
1402. King Jogaila of the Poland – Lithuania union marries Anna of Celje. She is a granddaughter of Casimir III of Poland. May 21 – Following the death of Queen Maria of Sicily, her husband Martin I of Sicily marries Blanche of Navarre. The University of Würzburg, Germany, is founded.
Jan 18, 2001 · The 1401 was a decimal (not binary) computer, with variable-length words composed of 8-bit bytes containing 6-bit BCD ( binary coded decimal) characters (plus parity and wordmark bits), and was intended primarily for business applications (its scientific counterpart was the 1620 ). The 1401 was the first in IBM's 1400 series of computers, which ...
