Bitcoin source code explained synonym

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In computingsource code is any collection of computer instructionspossibly with commentswritten using [1] a human-readable programming languageusually as plain text.

The source code of a program is bitcoin source code explained synonym designed to facilitate the work of computer programmerswho specify the actions to be performed by a computer mostly by writing source code. The source code is often transformed by an assembler or compiler into binary machine code understood by the computer. The machine code might then be stored for execution at a later time. Alternatively, source code may be interpreted and thus immediately executed.

Most application software is distributed in a form that includes only bitcoin source code explained synonym files. If the source code were included it would be useful to a userprogrammer or a system administratorany of whom might wish to study or modify the program.

The Linux Information Project defines source code as: Source code also referred to as source or code is the version of software as it is originally written i. The notion of source code may also be taken more broadly, to include machine code and notations in graphical languages, neither of which are textual in nature.

For the purpose of clarity "source code" is taken to mean any fully executable description of a software system. It is therefore so construed as to include machine code, very high level languages and executable graphical representations of systems.

Often there are several steps of program translation or minification between the original source code typed by a human and an executable program. While some, like the FSFargue that an intermediate file "is not real source code and does not count as source code", [5] others find bitcoin source code explained synonym convenient to refer to each intermediate file as the source code for the next steps.

The earliest programs for stored-program computers were entered in binary through the bitcoin source code explained synonym panel switches of the computer. Bitcoin source code explained synonym first-generation programming language had no bitcoin source code explained synonym between source bitcoin source code explained synonym and machine code.

When IBM first offered software to work with its machine, the source code was provided at no additional charge. At that time, the cost of developing and supporting software was included in the price of the bitcoin source code explained synonym.

For decades, IBM distributed source code with its software product licenses, after Most early computer magazines published source code as type-in programs. Occasionally the entire source code to a large program is published as a hardback book, such as Computers and Typesettingvol.

The source code which constitutes a program is usually held in one or more text files stored on a computer's hard disk ; usually these bitcoin source code explained synonym are carefully arranged into a directory treeknown as a source tree. Source code can also be stored in a database as is common for stored procedures or elsewhere.

The source code for a particular piece of software may be contained in a single file or many files. Though the practice is uncommon, a program's source code can be written in different programming languages.

It is also possible for some components of a piece of software to be written and compiled separately, in an arbitrary programming language, and later integrated into the software using a technique called library linking.

In some languages, such as Javathis can be done at run time each class is compiled into a separate file that is linked by the interpreter at runtime. Yet another method is to make the main program an interpreter for a programming language, [ citation needed ] either designed specifically for the application in question or general-purpose, and then write the bulk of the actual user functionality as macros or other forms of add-ins in this language, an approach taken for example by the GNU Emacs text editor.

The code base of a computer programming project is the larger collection of all the source code of all the computer programs which make up the project. It has become common practice to maintain code bases in version control systems. Moderately complex software customarily requires the bitcoin source code explained synonym or assembly of several, sometimes dozens or even hundreds, of different source code files.

In these cases, instructions for compilations, such as a Makefileare included with the source code. These describe the programming relationships among the source code files, and contain information about how they are to be compiled.

The revision control system is another tool frequently used by developers for source code maintenance. Source code is primarily used as input to the process that produces an executable program i. It is also used as a method of communicating algorithms between people e. Computer programmers often find it helpful to review existing source code to learn about programming techniques. Porting software to other computer platforms is usually prohibitively difficult without source code.

Without the source code for a particular piece of software, portability is generally computationally expensive. Decompilation of an executable program can be used to generate source code, either in assembly code or in a high-level language. Programmers frequently adapt source code from one piece of software to use in other projects, a concept known as software reusability.

The situation varies worldwide, but in the United States beforesoftware and its source code was not copyrightable and therefore always public domain software. In in the United States court case Apple v. Franklin it was ruled that the same applied to object code ; and that the Copyright Act gave computer programs the copyright status of literary works. Inin the United States court case Bernstein v.

United States it was further ruled that source code could be considered a constitutionally protected form of free speech. Proponents of free speech argued that because source code conveys information to programmers, is written in a language, and can be used to share humor and other artistic pursuits, it is a protected form of communication. Licensed under the Apache License, Version 2. You may obtain a copy of the License at. See the License for the specific language governing permissions and limitations under the License.

An author of a non-trivial work like software, [11] has several exclusive rightsamong them the copyright for the source code and object code. Software, and its accompanying source code, bitcoin source code explained synonym be associated with several licensing paradigms; the most important distinction is open source vs proprietary software. This is done by including a copyright notice that declares licensing terms.

If no notice is found, then the default of All rights reserved is implied. Generally speaking, software is open source if the source code is free to use, distribute, modify and study, and proprietary if the source code is kept secret, or is privately owned and restricted.

One of the first software licenses to be published and to explicitly grant these freedoms was the GNU General Public License in ; the BSD license is another early example from For proprietary software, the provisions of the various copyright laws, trade secrecy and patents are used to keep the source code closed.

Additionally, many pieces of retail software come with an end-user license agreement EULA which typically prohibits decompilationreverse engineeringanalysis, modification, or circumventing of copy protection. Bitcoin source code explained synonym of source code protection—beyond traditional compilation to object code —include code encryption, code obfuscation or code morphing.

The way a program is written can have important consequences for its maintainers. Coding conventionswhich stress readability and bitcoin source code explained synonym language-specific conventions, are aimed at the maintenance of the software source code, which involves debugging and updating.

Other priorities, such as the speed of the program's execution, or the ability to compile the program for multiple architectures, often make code readability a less important consideration, since code quality generally depends on its purpose. From Bitcoin source code explained synonym, the free encyclopedia. For the film, see Source Code. For the compression method, see source coding. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources.

Unsourced material may be challenged and removed. August Learn how and when to remove this template message. History of free and open-source software. Copyright [yyyy] [name of copyright owner] Licensed under the Apache Bitcoin source code explained synonym, Version 2. You may obtain a copy of the License at http: Archived from the original PDF on 23 February Is IBM playing fair? The Open Source Perspective. Software and Internet Lawp.

US Department of Justice on eff. Retrieved from " https: Use dmy dates from January Articles needing additional references from August All articles needing additional references All articles with unsourced statements Articles with unsourced statements from May Articles with unsourced statements from October Articles with unsourced bitcoin source code explained synonym from July Wikipedia articles with LCCN identifiers Wikipedia articles with GND identifiers Wikipedia articles with BNF identifiers.

Views Read Edit View history. In other projects Wikimedia Commons. This page was last edited on 3 Mayat By using this site, you agree to the Terms of Use and Privacy Policy. Source code Object code Bytecode Machine code Microcode. Wikimedia Commons has media related to Source code.

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Bitcoin is a digital and global money system currency. It allows people to send or receive money across the internet, even to someone they don't know or don't trust.

Money can be exchanged without being linked to a real identity. The mathematical field of cryptography is the basis for Bitcoin's security. A Bitcoin address, or simply address, is an identifier of letters and numbers, beginning with the number 1 or 3, that represents a possible destination for a bitcoin payment.

Addresses can be generated at no cost by any user of Bitcoin. For example, using Bitcoin Core, one can click "New Address" and be assigned an address. It is also possible to get a Bitcoin address using an account at an exchange or online wallet service. One of the differences between using bitcoin and using regular money online is that bitcoin can be used without having to link any sort of real-world identity to it. Unless someone chooses to link their name to a bitcoin address, it is hard to tell who owns the address.

Bitcoin does not keep track of users; it keeps track of addresses where the money is. Each address has two important pieces of cryptographic information, or keys: The public key, which is what the "bitcoin address" is created from, is similar to an email address; anyone can look it up and send bitcoins to it.

The private address, or private key, is similar to an email password; only with it can the owner send bitcoins from it. Because of this, it is very important that this private key is kept secret.

To send bitcoins from an address, you prove to the network that you own the private key that corresponds to the address, without revealing the private key. This is done with a branch of mathematics known as public key cryptography. A public key is what determines the ownership of bitcoins, and is very similar to an ID number.

If someone wanted to send you bitcoins, all you would need to do is supply them your bitcoin address, which is a version of your public key that is easier to read and type. Anyone using the system can see how much money "ABC" has and how much money "DEF" has, but they cannot tell anything about who owns the address.

But Bob and Alice each have a second key which only they individually know. This is the private key, and it is the "other half" of a Bitcoin address. The private key is never shared, and allows the owner of the bitcoins to control them. However, if the private key is not kept secret, then anyone who sees it can also control and take the bitcoins there.

The person who took it, told others about it later, saying "I'll send it back once Matt gives me a new address, since someone else can sweep [empty] out the old one. Sites or users using the Bitcoin system are required to use a global database called the blockchain. The blockchain is a record of all transactions that have taken place in the Bitcoin network. It also keeps track of new bitcoins as they are generated. With these two facts, the blockchain is able to keep track of who has how much money at all times.

To generate a bitcoin, a miner must solve a math problem. However, the difficulty of the math problem depends on how many people are mining for bitcoin at the moment. Because of how complicated the math problems usually are, they must be calculated with very powerful processors. The process of generating the bitcoins is called mining. People who use these machines to mine bitcoins are called miners. Miners either compete with one another or work together in groups to solve a mathematical puzzle.

The first miner or group of miners to solve the particular puzzle are rewarded with new bitcoins. The puzzle is determined by the transactions being sent at the time and the previous puzzle solution. This means the solution to one puzzle is always different from the puzzles before. Attempting to change an earlier transaction, maybe to fake bitcoins being sent or change the number of someone's bitcoins, requires solving that puzzle again, which takes a lot of work, and also requires solving each of the following puzzles, which takes even more work.

This means a bitcoin cheater needs to outpace all the other bitcoin miners to change the bitcoin history. This makes the bitcoin blockchain very safe to use. A popular image associated with Bitcoin is a QR code. QR codes are a group of black and white boxes that are similar to barcodes.

Barcodes have one dimension of information, while QR codes have two horizontal and vertical. Barcodes are a row of lines, and QR codes are a grid of squares. Bitcoin uses QR codes because they can store a lot of information in a small space, and a camera such as a smartphone can read them. The two QR codes on the Bitcoin note are the public and private addresses, and can be scanned with a number of online tools.

Everyone in the Bitcoin network is considered a peer, and all addresses are created equal. All transactions can take place solely from peer to peer, but a number of sites exist to make these transactions simpler. These sites are called exchanges. Exchanges provide tools for dealing in Bitcoin. Some allow the purchase of Bitcoin from external accounts, and others allow trading with other cryptography-based currencies like Bitcoin.

Most exchanges also provide a basic "wallet" service. Wallets provide a handy way to keep track of all of a user's public and private addresses. Because addresses are pseudo-anonymous, anyone can have as many addresses as they want.

This is useful for dealing with multiple people, but it can get complicated to manage multiple accounts. A wallet holds all of this information in a convenient place, just like a real wallet would. A backup of a wallet prevents 'losing' the bitcoins. Bitcoin adoption and use continues to grow a lot every year. Since , Bitcoin has gained the attention of the mainstream media; one way is the WannaCry ransomware created in May Bitcoin has often been criticized for its unstable price, its network's high electricity consumption, and for its high transaction fees.

Additionally, it has been criticized for having characteristics in common with Ponzi and pyramid schemes. From Wikipedia, the free encyclopedia.

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