ⓘ Computer errors ..

1983 Soviet nuclear false alarm incident

On 26 September 1983, the nuclear early-warning system of the Soviet Union reported the launch of multiple intercontinental ballistic missiles from bases in the United States. These missile attack warnings were felt to be false alarms by Stanislav Petrov, an officer of the Soviet Air Defence Forces. This decision is seen as having prevented a retaliatory nuclear attack against the United States and its NATO allies, which would have resulted in an immediate and irrevocable escalation to a full-scale nuclear war. Investigation of the satellite warning system later determined that the system ...

Abnormal end

An AbEnd is an abnormal termination of software, or a program crash. This usage derives from an error message from the IBM OS/360, IBM zOS operating systems. Usually capitalized, but may appear as "abend". The most common were ABEND 0C7 Data exception and ABEND 0CB Division by zero. Abends could be "soft" allowing automatic recovery or "hard" terminating the activity. Errors or crashes on the Novell NetWare network operating system are usually called ABENDs. Communities of NetWare administrators sprung up around the Internet, such as abend.org. The term is jocularly claimed to be derived f ...

Black screen of death

The Black screen of death is an error screen displayed by some operating systems after encountering a critical system error which can cause the system to shut down.

RSOD

A stop error, commonly called the blue screen of death, blue screen, or BSoD, is an error screen displayed on a Windows computer system following a fatal system error. It indicates a system crash, in which the operating system has reached a condition where it can no longer operate safely.

Bomb (icon)

TOS-based systems, such as the Atari ST, used a row of bombs to indicate a critical system error. The number of bombs displayed revealed information about the occurred error. The error also called an exception is reported by the Motorola 68000 microprocessor. The very first version of TOS used mushroom clouds; this was quickly changed, as it was considered politically incorrect. 24 bombs: Spurious Interrupt 7 bombs: TRAPV Instruction 15 bombs: Uninitialized Interrupt Vector 8 bombs: Privilege Violation 2 bombs: Bus Error 5 bombs: Division by zero 10 bombs: Line 1010 Emulator 27 bombs: Leve ...

Bounds checking

In computer programming, bounds checking is any method of detecting whether a variable is within some bounds before it is used. It is usually used to ensure that a number fits into a given type, or that a variable being used as an array index is within the bounds of the array. A failed bounds check usually results in the generation of some sort of exception signal. Because performing bounds checking during every usage is time-consuming, it is not always done. Bounds-checking elimination is a compiler optimization technique that eliminates unneeded bounds checking.

                                     

ⓘ Computer errors

  • An error message is information displayed when an unexpected condition occurs, usually on a computer or other device. On modern operating systems with
  • not differentiate syntax errors from errors of other kinds. There is some disagreement as to just what errors are syntax errors For example, some would
  • An error - tolerant design also: human - error - tolerant design is one that does not unduly penalize user or human errors It is the human equivalent of
  • random - error - detecting correcting and burst - error - detecting correcting. Some codes can also be suitable for a mixture of random errors and burst errors If
  • A logic error produces unintended or undesired output or other behaviour, although it may not immediately be recognized as such. Logic errors occur in
  • limitations and is thus designed in a way that induces errors The term can also be used for non - computer - related mistakes. Joel Spolsky points out that users
  • Compilation error refers to a state when a compiler fails to compile a piece of computer program source code, either due to errors in the code, or, more
  • accurate. Even small errors in the original data can accumulate into substantial error later in the simulation. While all computer analysis is subject
  • the camera General camera malfunction One major contributor to E18 lens errors is the improper use of camera cases, or the carrying of cameras in pockets
  • preferably avoid the effects of error whether unintentional or not. Such errors in a system can be latent design errors that may go unnoticed for years
  • Bugs can trigger errors that may have ripple effects. Bugs may have subtle effects or cause the program to crash or freeze the computer Other bugs qualify
  • estimate computation errors Computation errors also called numerical errors include both truncation errors and roundoff errors When a sequence of calculations