Easter egg
A virtual Easter egg is an intentional hidden
message or feature in an object such as a movie, book, CD, DVD, computer program, or video game. The term draws a parallel with the custom of the Easter egg hunt observed in many western nations.
This practice is analogous to hidden signature motifs such as Diego Rivera including himself in his murals or Alfred Hitchcock's legendary cameo appearances.
An early example of these kind of "Easter eggs" is Al Hirschfeld's "Nina." Atari's Adventure, released in 1979, contained what is thought to be the first video game "Easter egg": the name of the programmer (Warren Robinett).
In computer programming, the underlying motivation is often to put an individual, almost artistic touch on an intellectual product which is by its nature standardized and functional
Software-based
Easter eggs are messages, videos, graphics, sound effects, or an unusual change in program behavior that sometimes occur in a software program in response to some undocumented set of commands, mouse clicks, keystrokes or other stimuli intended as a joke or to display program credits. They are often located in the "About" box of a software. For example, two easter eggs exist in the "About" box of Adobe Photoshop 7: an alternative "Liquid Sky" splash screen and the ability to speed up credits to view funny quotations. An early use of the term Easter egg was to describe a message hidden in the object code of a program as a joke, intended to be found by persons disassembling or browsing the code.
Easter eggs found in some Unix operating systems caused them to respond to the command "make love" with "not war?" and "why" with "why not" (a reference to The Prisoner in Berkeley Unix 1977). The TOPS-10 operating system (for the DEC PDP-10 computer) had the "make love" hack before 1971; it included a short, thoughtful pause before the response. This same behavior occurred on the RSTS/E operating system where the command "make" was used to invoke the TECO editor, and TECO would also provide this response.
The largest Easter egg is purported to be in the Atari 400/800 version of Pitfall II: Lost Caverns, which contains an entire game that was more complex and challenging than the original Pitfall II. Many personal computers have much more elaborate eggs hidden in ROM, including lists of the developers' names, political exhortations, snatches of music, and (in one case) images of the entire development team. Easter eggs in the 1997 version of Microsoft Office include a hidden flight simulator[1][2] in Microsoft Excel and a pinball game[3] in Word. See main article Easter eggs in Microsoft products. The Palm operating system has elaborately hidden animations and other surprises. The Debian GNU/Linux package tool apt-get has an Easter egg involving an ASCII cow when variants on "apt-get moo" are typed into the shell.
An Easter Egg is found on all Microsoft Windows Operating Systems prior to XP. In the 3D Text screen saver, entering the text "volcano" will display the names of all the known volcanoes that exist in the world. Microsoft removed this Easter Egg in XP but added others. One which continues till Windows XP is to simultaneously hold the Alt, shift and the number 2 keys in the Solitaire game to produce a forced win.[4]
A number of early Microsoft programs had hidden animated stuffed animal characters which could be revealed by following a complicated sequence of inputs. An early version of Microsoft Excel contained a hidden Doom-like action game called "The Hall of Tortured Souls". Windows 3.1 has a hidden developer credits page, which can be accessed by following a sequence of right-clicking and entering code words which is passed around by word-of-mouth.
[edit] Non-software
While computer-related Easter eggs are often found in software, occasionally they exist in hardware or firmware of certain devices. On some PCs, the BIOS ROM contains Easter eggs. Notable examples include several early Apple Macintosh models which had pictures of the development team in the ROM (accessible by pressing the programmer's switch and jumping to a specific memory address, or other equally obscure means), and some errant 1993 AMI BIOS that on 13 November proceeded to play "Happy Birthday" via the PC speaker over and over again instead of booting. Similarly, the Radio Shack Color Computer 3's ROM contained code which would display the likenesses of three Microware developers on akeypress sequence - a hard reset which would discard any information currently in the dynamic memory.
Perhaps the most famous example of a hardware Easter egg is in the HP ScanJet 5P, where the device will play the Ode to Joy or Für Elise by varying the stepper motor speed if users power the device up with the scan button depressed. This is achieved through software intervention. Another Easter egg is found in the Kurzweil K2x musical keyboard series (K2500, K2600 and others): if users type "Pong" while in search mode they can play the game Pong. The EEPROM of Nagra smart cards for the Dish Network satellite television system contain the phrase "NipPEr Is a buTt liCkeR". Nipper was a hacker who broke old security routines on the cards, and this text is included as a fallback to old security routines, where the phrase was hashed against an input text to verify the card. Several oscilloscopes have been known to contain Easter eggs. One example includes the HP 54622D known to play Asteroids.
Many integrated circuit (chip) designers have included hidden artwork, including assorted images, phrases, developer initials, logos, and so on. This artwork, like the rest of the chip, is reproduced in each copy by lithography and etching. These are visible only when the chip package is opened and examined under magnification, so they are, in a sense, more of an "inside joke" than most of the Easter eggs included in software.
Originally, the Easter eggs served a useful purpose as well. Not unlike cartographers who may insert trap streets or nonexistent landscape features as a copyright infringement detection aid, IC designers may also build non-functional circuits on their chips to help them catch infringers. Easter eggs, however benign, if directly copied by the defendant, could be used in mask work infringement litigation. Changes to the copyright laws (in the USA, the Semiconductor Chip Protection Act of 1984, and similar laws in other countries) now grant automatic exclusive rights to mask works, and the Easter egg no longer serves any practical use.
A virtual Easter egg is an intentional hidden
message or feature in an object such as a movie, book, CD, DVD, computer program, or video game. The term draws a parallel with the custom of the Easter egg hunt observed in many western nations.This practice is analogous to hidden signature motifs such as Diego Rivera including himself in his murals or Alfred Hitchcock's legendary cameo appearances.
An early example of these kind of "Easter eggs" is Al Hirschfeld's "Nina." Atari's Adventure, released in 1979, contained what is thought to be the first video game "Easter egg": the name of the programmer (Warren Robinett).
In computer programming, the underlying motivation is often to put an individual, almost artistic touch on an intellectual product which is by its nature standardized and functional
Software-based
Easter eggs are messages, videos, graphics, sound effects, or an unusual change in program behavior that sometimes occur in a software program in response to some undocumented set of commands, mouse clicks, keystrokes or other stimuli intended as a joke or to display program credits. They are often located in the "About" box of a software. For example, two easter eggs exist in the "About" box of Adobe Photoshop 7: an alternative "Liquid Sky" splash screen and the ability to speed up credits to view funny quotations. An early use of the term Easter egg was to describe a message hidden in the object code of a program as a joke, intended to be found by persons disassembling or browsing the code.
Easter eggs found in some Unix operating systems caused them to respond to the command "make love" with "not war?" and "why" with "why not" (a reference to The Prisoner in Berkeley Unix 1977). The TOPS-10 operating system (for the DEC PDP-10 computer) had the "make love" hack before 1971; it included a short, thoughtful pause before the response. This same behavior occurred on the RSTS/E operating system where the command "make" was used to invoke the TECO editor, and TECO would also provide this response.
The largest Easter egg is purported to be in the Atari 400/800 version of Pitfall II: Lost Caverns, which contains an entire game that was more complex and challenging than the original Pitfall II. Many personal computers have much more elaborate eggs hidden in ROM, including lists of the developers' names, political exhortations, snatches of music, and (in one case) images of the entire development team. Easter eggs in the 1997 version of Microsoft Office include a hidden flight simulator[1][2] in Microsoft Excel and a pinball game[3] in Word. See main article Easter eggs in Microsoft products. The Palm operating system has elaborately hidden animations and other surprises. The Debian GNU/Linux package tool apt-get has an Easter egg involving an ASCII cow when variants on "apt-get moo" are typed into the shell.
An Easter Egg is found on all Microsoft Windows Operating Systems prior to XP. In the 3D Text screen saver, entering the text "volcano" will display the names of all the known volcanoes that exist in the world. Microsoft removed this Easter Egg in XP but added others. One which continues till Windows XP is to simultaneously hold the Alt, shift and the number 2 keys in the Solitaire game to produce a forced win.[4]
A number of early Microsoft programs had hidden animated stuffed animal characters which could be revealed by following a complicated sequence of inputs. An early version of Microsoft Excel contained a hidden Doom-like action game called "The Hall of Tortured Souls". Windows 3.1 has a hidden developer credits page, which can be accessed by following a sequence of right-clicking and entering code words which is passed around by word-of-mouth.
[edit] Non-software
While computer-related Easter eggs are often found in software, occasionally they exist in hardware or firmware of certain devices. On some PCs, the BIOS ROM contains Easter eggs. Notable examples include several early Apple Macintosh models which had pictures of the development team in the ROM (accessible by pressing the programmer's switch and jumping to a specific memory address, or other equally obscure means), and some errant 1993 AMI BIOS that on 13 November proceeded to play "Happy Birthday" via the PC speaker over and over again instead of booting. Similarly, the Radio Shack Color Computer 3's ROM contained code which would display the likenesses of three Microware developers on a
Perhaps the most famous example of a hardware Easter egg is in the HP ScanJet 5P, where the device will play the Ode to Joy or Für Elise by varying the stepper motor speed if users power the device up with the scan button depressed. This is achieved through software intervention. Another Easter egg is found in the Kurzweil K2x musical keyboard series (K2500, K2600 and others): if users type "Pong" while in search mode they can play the game Pong. The EEPROM of Nagra smart cards for the Dish Network satellite television system contain the phrase "NipPEr Is a buTt liCkeR". Nipper was a hacker who broke old security routines on the cards, and this text is included as a fallback to old security routines, where the phrase was hashed against an input text to verify the card. Several oscilloscopes have been known to contain Easter eggs. One example includes the HP 54622D known to play Asteroids.
Many integrated circuit (chip) designers have included hidden artwork, including assorted images, phrases, developer initials, logos, and so on. This artwork, like the rest of the chip, is reproduced in each copy by lithography and etching. These are visible only when the chip package is opened and examined under magnification, so they are, in a sense, more of an "inside joke" than most of the Easter eggs included in software.
Originally, the Easter eggs served a useful purpose as well. Not unlike cartographers who may insert trap streets or nonexistent landscape features as a copyright infringement detection aid, IC designers may also build non-functional circuits on their chips to help them catch infringers. Easter eggs, however benign, if directly copied by the defendant, could be used in mask work infringement litigation. Changes to the copyright laws (in the USA, the Semiconductor Chip Protection Act of 1984, and similar laws in other countries) now grant automatic exclusive rights to mask works, and the Easter egg no longer serves any practical use.
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