invented cobol

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"Imitation" or "innovation"

Before we prove it, let's go back to one thing that happened 300 years ago. The story may be a little dull. This is a particularly typical Chinese science, or the so-called inspirational education story. The people who went to school in the 90 will have such famous sayings on the walls. Everyone should have seen this person and have heard the story.It is known that Watt invented the steam engine, and the traditional saying is that Watt

Computer system roaming

binary code stored in a computer system, which is stored, passed, and processed in binary form. Only when interacting with humans, as shown on the screen or printed out, will it be translated into familiar forms.2. Programs are translated into different formats by other programsBefore we said the main function of the computer is to process information, that is, processing ... 01101100 ... this binary code. There's obviously a problem with computers as a life-without-intelligence thing, how does

The greatest ten algorithms in the 20th Century

References:The Best of the 20th Century: Editors Name Top 10 Algorithms.By Barry A. CIPRA.Address: Http://www.uta.edu/faculty/rcli/topten/topten.htm. Bloggers:1. The top ten algorithms in the 20th century,Quick Sorting Algorithm, Or fastFourier Transform AlgorithmFor other algorithms, you only need to know more about them.2. This Article is not the latest article. I am only interested in algorithms, so I also translate and study it.==================================== Several algorithm masters

Line breaks in Linux and Windows

Line breaks in Linux and Windows Carriage Return and line feed generate background The origins and differences between carriage return and line feed.Before the computer appeared, there was a kind of device called teletype model 33, which can contain 10 characters per second. But there is a problem, that is, when a line breaks a line, it takes 0.2 seconds, just two characters. If a new character is passed in the 0.2 s, the character will be lost.As a result, the developers thought of a way to sol

Without a famous teacher's Unix heart

said nothing, just pointing to the moon. A dog yarn his hand."I don't understand ." The programmer said.Without a famous teacher, he was still silent, pointing to a Buddha image, and then pointing to a window."What do you want to say ?" Ask the programmer.No famous teacher pointed to the programmer's head, and then pointed to a big stone."Please make it clear !" The programmer asked.Without a famous teacher's deep eyebrows, pat the programmer's nose twice and throw him to the garbage bin next t

Programmer's point of view-who is the hero?

separated from hardware. In essence, the two can switch between each other rather than absolutely mutually exclusive. However, to a large extent, it should be said that programs have changed the world, iPad, iPhone, and PC, router or server. After all, it's just a bunch of programs added to the "Smelly skins. There is no depression in the field of electronic engineering and related manufacturing. I just want to emphasize the soul role of software. As a programmer, I personally want to pay tribu

The greatest ten algorithms in the 20th Century

Http://blog.csdn.net/v_JULY_v/archive/2011/01/10/6127953.aspx The greatest ten algorithms in the 20th Century Translator: July November January 10, 2011 ------------------------------------ References:The best of the 20th Century: editors name top 10 algorithms.By Barry A. CIPRA. Bloggers:1. In addition to the fast sorting algorithm or the fast Fourier transformation algorithm, the top ten algorithms in the 20th century only need to be slightly understood.2. This Article is not the latest ar

Review Jack Ma's speech on Yahoo employees

broken bread and then sell it. As a result, the M logo can be seen all over the world. The boss of pizza hut is lazy and puts the pie stuffing in it and sells it directly on the top of the pie. As a result, it is called pizza, which is more expensive than 10. There are also smarter lazy people: So they invented the elevator; They walk lazily, so they make cars, trains, and planes; They killed people one by one, so they

An infinitely small calculus (comeback) for 40 years

In the title of this article, we use the word "restoration", instead of "Resurrection", which is clearly intended, meaning that the infinitely small calculus has restored the glory of the year, I have taken back my crown ". In the past, leveniz invented the "infinitely small" and used it for the analysis and research of the local state of the function. After the computation process was completed, the non-zero infinitely small was abandoned, making peo

Human efficiency or machine efficiency?

for people all the way, however, it has never been our main development goal to improve the efficiency of machine work. This is the "Paradox" that I have just mentioned that makes me confused. Let's take a look at the development path of the programming language to learn more about this trend. First, our early programmers put a line on the tape to represent the holes in the machine code, and then handed it to the machine for processing. Then we invented

Asp. NET review notes (1)

Today is a good day, accompanied by the Morning eight o ' Sun, I carry schoolbag, put on the computer, with a network cable, Fengfenghuohuo rushed to the classroom, because, I finally want to write what the blog content-this is not the end of the final, I write review, although some courses have not finished, but does not affect my review, just, Can also take the things that have not learned before, take advantage of the network, there are teachers, to solve them out ~(i) Web application Fundame

Implementation principle of HTTPS protocol

URLhttp://www.techug.com/The part that I added in bold is the HTTP protocol. Most Web sites use the HTTP protocol to transfer web pages, as well as various things (images, CSS styles, JS scripts) that are contained on Web pages.2. What does "SSL/TLS" Do with the drip?SSL is the abbreviation for foreign language "secure Sockets layer", which is called "Secure Sockets Layer" in Chinese. It was designed by Netscape in the middle of the 90 century. (Incidentally, Netscape not only

Programming experts in post-posting

doctor's hat. The one that makes grandpa Dai really famous is the algo60 developed on X1, one of the earliest advanced languages. Grandpa Dai worked day and night for 8 months, and then he got algo60. He also won the Turing Award in 1972. Because of algo60, Grandpa Dai published a shocking article: recursive programming, so people know that the original advanced language can also implement recursion efficiently. Since then, all programmers are inevitably dealing with the stack, a word

What is pasteurization?

1. What is pasteurization? The milk pasteuration method was invented by the French user Pasteur in 1865. It was improved by future generations to completely eliminate pathogens in beer, wine, milk, serum albumin, and other liquids, it is also a common milk disinfection method in the world. The purpose of pasteurization is to kill all possible harmful microorganisms (including all pathogenic bacteria) in milk ). Before the pasteuration method was

Principles of holographic photos

space position of each point. When a reference beam is used to illuminate a dry film, the light we see is like being sent from the original object. Therefore, we say that it records all the light information sent from the object, and the name of the holographic photo is obtained accordingly. However, laser holographic photos only show a three-dimensional image in the eyes under laser radiation. laser is a expensive device, and a photo must be equipped with a laser, in addition to the possible s

[Original] What is mathematics?

said that God has created natural numbers, and other numbers are invented by humans. Number theory is regarded as pure mathematics, that is, it is too far away from practical application. However, the number theory results of a few hundred years ago seem to have been widely used in a few hundred years. Modern cryptography is based on number theory. The common key cryptography system is based on a large number of prime factors. The Euclidean era prove

Talk about the love triangle between programmers, compilers, and CPUs.

CPU companies to consider things, and software engineers completely unrelated.2. Early Paper punch Programmer(1) At the earliest, the CPU was very simple, the instruction set was very small and the number of binary bits was not much. At that time the compiler was not invented, and the programming language was not invented, then it was programmed directly with binary.(2) Summary: The earliest programming ha

Background of WEB page tool Language XML

Like HTML, XML comes from StandardGeneralizedMarkupLanguage, which is a general Markup Language (SGML) for scale. Before the Web was invented, SGML already existed. As its name implies, SGML is a general language that uses tags to describe document materials. Like HTML, XML comes from Standard Generalized Markup Language (SGML. Before the Web was invented, SGML already existed. As its name implies, SGML is

Reprinted: true programming experts-encourage computer students

own doctoral thesis around it and put on his doctor's hat. The one that makes grandpa Dai really famous is the Algo60 developed on X1, one of the earliest advanced languages. Grandpa Dai worked day and night for 8 months, and then he got Algo60. He also won the Turing Award in 1972. Because of Algo60, Grandpa Dai published a shocking article: Recursive Programming, so people know that the original advanced language can also implement recursion efficiently. Since then, all programmers are inevit

Computer science in my mind

-coated shells and took over the hot potato. Two or three years later, he not only made real-time interruptions, but also wrote his own doctoral thesis around it and put on his doctor's hat.   #61548; the one that makes grandpa Dai really famous is algo60 developed on X1, one of the earliest advanced languages. Grandpa Dai worked day and night for 8 months, and then he got algo60. He also won the Turing Award in 1972. Because of algo60, Grandpa Dai published a shocking article: recursive program

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