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bomb icon wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 in computing toggle in computing subsection 1 1 mac os 1 2 atari st tos 1 3 as a dingbat and an emoji 2 see also 3 references 4 external links toggle the table of contents bomb icon 5 languages deutsch italiano polski svenska 中文 edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikimedia commons wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia symbolic image used to represent a bomb this article needs more citations please help improve this article by adding citations to reliable sources unsourced material may be challenged and removed find sources bomb icon news newspapers books scholar jstor february 2008 learn how and when to remove this message mac os system error alert from the system 7 era these were a common sight and mac users of the era might need a paper clip if the programmer s key wasn t installed in order to restart the computer since the onscreen restart button would usually be nonfunctional the bomb icon usually depicted as a black sphere with sparking fuse 1 has several different applications in computing and typically indicates a fatal system error in computing edit mac os edit mac os system error bomb icon the bomb icon in mac os is a symbol designed by susan kare that was displayed inside the system error alert box when the classic macintosh operating system had a crash which the system decided was unrecoverable 2 3 since the classic mac os offered no memory protection an application crash would often take down the entire system the bomb symbol first appeared on the original macintosh in 1984 2 often a reason for the crash including the error code was displayed in the dialog in some cases a resume button would be available allowing the user to dismiss the dialog and force the offending program to quit but most often the resume button would be disabled and the computer would have to be restarted originally the resume button was unavailable unless the running program had provided the os with code to allow recovery with the advent of system 7 if the os thought it could handle recovery a normal error dialog box was displayed and the application was forced to quit this was helped by the classic mac os providing a little bit of protection against heap corruption using guard pages if the application was to crash and the application s heap was corrupt it could be thrown away the debugger program macsbug was sometimes used even by end users to provide basic though not always reliable error recovery and could be used for troubleshooting purposes much as the output of a unix kernel panic or a windows nt blue screen of death could be mac os classic bomb boxes were often ridiculed for providing little or no useful information about the error presenting only information such as system error 11 or address error this was a conscious decision by the macintosh team to eliminate any information that the end user could not make sense of the error code was intended to be included in a bug report to the developer in mac os x being based on bsd s unix like kernel the system architecture is vastly different from that in the classic mac os and an application crash cannot usually bring down the entire system a kernel panic screen either text overwritten on the screen in older versions or simplified to a reboot message in more recent versions replaces the bomb symbol but appears less often due to the radically different system architecture the bomb symbol is not used in mac os x but a test application called bomb app specifically written to cause a non fatal crash is included with xcode and uses a rendition of the bomb symbol as its icon in the original mac os the system call to display a bomb box was called dserror for deep shit 4 this was deemed obscene and became the system error manager 5 atari st tos edit on the atari st the four bombs indicate that the system error illegal instruction has occurred 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 first version of tos used mushroom clouds 6 1 bomb reset initial pc2 2 bombs bus error 3 bombs address error 4 bombs illegal instruction 5 bombs division by zero 6 bombs chk instruction 7 bombs trapv instruction 8 bombs privilege violation 9 bombs trace 10 bombs line 1010 emulator 11 bombs line 1111 emulator 12 13 bombs reserved 14 bombs format error 15 bombs uninitialized interrupt vector 16 23 bombs reserved 24 bombs spurious interrupt 25 bombs level 1 interrupt autovector 26 bombs level 2 interrupt autovector 27 bombs level 3 interrupt autovector 28 bombs level 4 interrupt autovector 29 bombs level 5 interrupt autovector 30 bombs level 6 interrupt autovector 31 bombs level 7 interrupt autovector 32 47 bombs trap instruction vectors 48 63 bombs reserved 64 255 bombs user interrupt vectors 7 as a dingbat and an emoji edit bomb from noto emoji set bomb symbol was present in microsoft wingdings dingbats font developed in 1990 8 1 and in early japanese emoji implementations 9 subsequently added to miscellaneous symbols and pictographs character block in unicode version 6 0 with code point u 1f4a3 bomb 10 see also edit grenade insignia screen of death references edit 1 2 humez alexander humez nicholas flynn rob 2010 08 03 short cuts a guide to oaths ring tones ransom notes famous last words and other forms of minimalist communication oxford university press p 24 isbn 978 0 19 975868 5 1 2 susan kare s early mac icons gave computers a personality photos cnet retrieved 2025 04 17 susan kare moma the museum of modern art retrieved 2025 04 17 chris espinosa cdespinosa january 25 2014 mac 128k fun fact the bomb box was invoked by the a trap dserror in the system error manager during development ds stood for deep shi tweet archived from the original on 2021 08 18 retrieved 2021 08 17 via twitter andy hertzfeld busy being born part 2 the original macintosh folklore org retrieved 2008 02 05 the bomb icon is deep that s the first word of the original name of the code an obscene name with the api calls prefixed with ds eventually settling on the more prosaic system error manager plotkin david april 1989 the new tos rom error codes start vol 3 no 9 via atarimagazines com krynak robert jun 5 1991 help line q a re tos error 39 cleveland free net atari sig mailing list retrieved 2017 09 01 via atariarchives org wingdings and webdings symbols unicode document 11 052 by michel suignard 2011 02 15 the study of the repertoire and possibilities of unification unicode consortium emoji sources unicode character database miscellaneous symbols and pictographs range 1f300 1f5ff the unicode standard version 6 0 pdf unicode org archived pdf from the original on 2010 11 25 external links edit about the system error handler v t e error messages system failure bomb icon fatal system error guru meditation kernel panic linux kernel oops red ring of death sad mac screen of death blue black application failure abend fatal exception error segmentation fault device and data errors http 403 http 404 lp0 on fire not a typewriter pc load letter other abort retry fail bad command or file name halt and catch fire http 418 out of memory does not compute lists list of http status codes list of ftp server return codes list of smtp server return codes errno h related spinning pinwheel windows wait cursor retrieved from https en wikipedia org w index php title bomb_ icon oldid 1359074697 categories computer errors macintosh operating systems user interface atari st screens of death hidden categories articles with short description short description matches wikidata articles needing additional references from february 2008 all articles needing additional references this page was last edited on 12 june 2026 at 22 39 utc page was rendered with parsoid text is available under the creative commons attribution sharealike 4 0 license additional terms may apply by using this site you agree to the terms of use and privacy policy wikipedia is a registered trademark of the wikimedia foundation inc a non profit organization privacy policy about wikipedia disclaimers contact wikipedia legal safety contacts code of conduct developers statistics cookie 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