1421:
332:, when developing computer programs or storing and manipulating data in files, the Tab character is often used for indentation purposes to help guide the flow of reading and add semantic structure to the code or data. Some programmers and programming languages prefer the usage of multiple whitespace characters instead for that purpose. Because of this, many text editors have an option that makes the tab key insert the number of whitespace characters that a tab character is set to be equivalent to (by default mostly four).
175:
133:
36:
299:, you may type the first few characters of a command or file-name, then press Tab. If there is no ambiguity about your intent, the rest of the characters will appear automatically. On some systems, even if your input is ambiguous, tab completion may give you a list of possible options to select from. Tab completion is more common on
222:
key to back up to the position of the first digit is practical but slow. Various schemes for numeric tabs were proposed. For example, in 1903, Harry Dukes and
William Clayton filed for a patent on a tab mechanism with multiple tab keys numbered 1, 10, 100, etc. Pressing 1 was a simple tab. Pressing
428:
Despite the fact that five characters were the typical paragraph indentation on typewriters at that time, the horizontal tab size of eight evolved because as a power of two it was easier to calculate with the limited digital electronics available. Using this size tab to indent code results in much
424:
standardized at every multiple of eight characters horizontally, and every six lines vertically. A printing program could send zero or more tabs to get to the closest tab stop above and left of where it wanted to print, then send line feeds and spaces to get to the final location. Tab characters
230:
filed for a patent in 1904 covering a system where the tab stops were permanently mounted on the tab bar. To set or reset a tab for a particular column, the tab stop for that column was simply rotated in or out of engagement. In 1940, James Koca filed for a patent on a mechanism allowing the tab
217:
the first line of each paragraph. Often a first tab stop at 5 or 6 characters was used for this, far larger than the indentation used when typesetting. For numeric data, however, the logical place for the tab stop is the location of the least significant digit. Tabbing to this location and then
443:
includes the codes 136 (Horizontal
Tabulation Set), 137 (Horizontal Tabulation with Justification) and 138 (Vertical Tabulation Set) that were intended to allow the program to set and clear tab stops. This is rarely used or supported.
459:
and formatted into a table with a single command. For example, in
Microsoft Word 2010, Insert > Table > Convert Text to Table... is the necessary command, producing a dialog where the user selects further details.
231:
stops for each column to be set and cleared from the keyboard, eliminating the need for the typist to bend over the back of the machine to directly manipulate the tab rack. These keys, if present, are typically labeled
420:
to indicate the tab stops. These were manually set to match the pre-printed forms that were loaded into the printer. In practice, settable tab stops were rather quickly replaced with fixed tab stops,
437:, and whether to use tabs at all, are common. Modern text editors usually have the Tab key insert the user-defined indentation and may use heuristics to adapt this behavior to existing files.
325:, the Tab key is very often used to show scores in multiplayer games. For single player games it is also used to show the world map or the player's inventory, as well as other useful info.
210:. The original tabulator stops were adjustable clips that could be arranged by the user on the tabulator rack. Fredric Hillard filed a patent application for such a mechanism in 1900.
255:, the Tab key will move the insertion point to the next tab stop in a table, insert the ASCII tab character, or insert multiple space characters (depending on the program used).
416:
Originally, printer mechanisms used mechanical tab stops to indicate where the tabs went. This was done horizontally with movable metal prongs in a row, and vertically with a
206:
key. To simplify this, a horizontal bar was placed in the mechanism called the tabulator rack. Pressing the tab key would advance the carriage to the next
433:, allow the size of the tab to be changed, and some (in particular on Windows) default to four instead of eight. Disagreements between programmers about
590: This line begins with a single tab. Here are some more tab characters ! T.......T.......T.......T.......T.......T.......T.......T
576: This line begins with a single tab. Here are some more tab characters ! T.......T.......T.......T.......T.......T.......T.......T
455:(TSV) are used for exporting and importing database or spreadsheet field values. Text divided into fields delimited by tabs can often be pasted into a
943:
476:
TSV has also been cited in a modern approach to solving the programming debate regarding the use of tabs and spaces for code alignment called
1528:
1526:
1490:
1101:
1747:
262:(and Shift-Tab will move the cursor to the previous field), eliminating the need to use a mouse to click in an adjacent field.
1261:
194:, which means "to arrange data in a tabular, or table, form." When a person wanted to type a table (of numbers or text) on a
1425:
1491:
1478:
1477:
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430:
1516:
100:
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599:, the eight-character spacing, and how a tab stop is skipped if there are more than eight characters since last one.
119:
606:
property, which adjusts the number of spaces for the tab character from the default of eight. The latest version of
72:
1465:
467:(CSV) convention (that may be using semicolons instead of commas), and both are easily converted into each other.
1537:
1535:
1449:
1429:
480:. This idea uses a scheme called tab-separated columns (TSC) rather than the similar tab-separated values (TSV).
657:
code points for the (horizontal) tab character, and the more rarely used vertical tab character are copied from
1531:
79:
57:
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1450:
1434:
1433:
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Initially tab stops were set by adding and removing clips from the tab rack, but Edward Hess working for the
17:
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10 advanced to the space before the tab, pressing 100 advanced to the position 2 spaces before the tab.
1910:
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968:
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but as with all whitespace characters in HTML, this will be displayed as a single space except inside
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such as buttons so that the user interface can be used without a mouse at all (this was part of the
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When filling out a computerized form, pressing Tab will sometimes move the cursor to the next
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383:. The horizontal tab is usually inserted when the Tab key on a standard keyboard is pressed.
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329:
8:
2102:
2056:
1988:
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615:
1152:
1138:
1005:
Harry S. Dukes and
William H. Clayton, Tabulating mechanism for type-writing machines,
735:
Unicode also has characters for the symbols to represent or be printed on the tab key:
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1711:
1268:
1257:
924:
470:
434:
319:
312:
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266:
93:
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Unicode provides additional characters for tab symbols with triangle-headed arrow:
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373:
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model 2201. On this machine, the tab-rack is removable for easy reconfiguration.
2014:
1983:
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456:
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The tab mechanism came into its own as a rapid and consistent way of uniformly
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1037:
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can be used to complete a partially typed piece of text. For example, in some
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The TSV convention for exporting data may be compared to the alternative
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loop of mylar or other tape the length of a page with holes punched in it
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1968:
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the code for HT is 5. VT is 11 (coincidentally the same as in ASCII).
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2019:
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white space on the left, so most text editors for code, such as
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has the decimal character code of 9, and may be referred to as
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Notice that the tab at the start of a line is removed outside
198:, there was a lot of time-consuming and repetitive use of the
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349:
300:
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562:! T.......T.......T.......T.......T.......T.......T.......T
638:
489:
304:
1077:"Elastic tabstops - a better way to indent and align code"
390:(VT) also exists and has ASCII decimal character code 11 (
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642:
676:(CHARACTER TABULATION, horizontal tabulation (HT), tab)
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Character encodings in HTML#HTML character references
694:
The tab characters can be graphically represented by
1153:"CSS tab-size property on Mozilla Developer Network"
750:
LEFTWARDS ARROW TO BAR OVER RIGHTWARDS ARROW TO BAR
288:, this is an option called "Full Keyboard Access".
60:. Unsourced material may be challenged and removed.
969:"Instructions for Using the Underwood Typewriter"
2084:
473:use tab-separated values to indicate selectors.
1423:
1106:
1200:
265:In many graphical applications, especially on
1741:
1276:
1231:"Miscellaneous Symbols and Arrows โ Unicode"
690:(LINE TABULATION, vertical tabulation (VT))
1748:
1734:
1283:
1269:
1139:"CSS 3 tab-size property W3 specification"
1035:James F. Koca, Typewriter stop mechanism,
990:Fredric W. Hillard, Type-writing machine,
425:simply became a form of data compression.
162:is used to advance the cursor to the next
379:can be used to put this character into a
120:Learn how and when to remove this message
538:This line begins with a single tab. Here
173:
131:
944:"Underwood Portable Typewriter Gallery"
856:RIGHTWARDS TRIANGLE-HEADED ARROW TO BAR
447:
14:
2085:
1418:
1251:
1167:"Extensible Markup Language (XML) 1.0"
873:DOWNWARDS TRIANGLE-HEADED ARROW TO BAR
822:LEFTWARDS TRIANGLE-HEADED ARROW TO BAR
1729:
1074:
767:LEFTWARDS ARROW OVER RIGHTWARDS ARROW
1173:. 26 November 2008. sec. "Charsets".
839:UPWARDS TRIANGLE-HEADED ARROW TO BAR
630:CSS property with the same meaning.
58:adding citations to reliable sources
29:
340:The most known and common tab is a
24:
1419:
1114:"Character Entity Reference Chart"
492:the horizontal tab is coded using
25:
2114:
1755:
1020:Edward B. Hess, Writing Machine,
335:
136:Tab key (top left) on a standard
713:SYMBOL FOR HORIZONTAL TABULATION
34:
27:Key on a keyboard for tabulation
1177:
1159:
1145:
1131:
242:
45:needs additional citations for
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1044:
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999:
984:
961:
936:
729:SYMBOL FOR VERTICAL TABULATION
13:
1:
1185:"C0 Controls and Basic Latin"
930:
508:tags (or other elements with
269:, the Tab key will move the
7:
912:
10:
2119:
1406:
648:
435:what size tabs are correct
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2028:
1997:
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626:web browser supports the
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618:web browser supports the
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603:
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403:
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1041:, granted Sep. 19, 1944.
1026:, granted Aug. 17. 1909.
1011:, granted Dec. 29, 1908.
996:, granted Feb. 10, 1903.
533:
228:Royal Typewriter Company
800:RIGHTWARDS ARROW TO BAR
483:
297:command-line interfaces
1540:
919:Comma-separated values
783:LEFTWARDS ARROW TO BAR
637:but is not allowed in
593:
465:comma-separated values
282:IBM Common User Access
190:derives from the word
183:
140:
2036:Power management keys
1539:
1038:U.S. patent 2,358,517
525:
370:programming languages
342:horizontal tabulation
177:
135:
2038:(Power, Sleep, Wake)
1052:"Tabs versus Spaces"
753:(tab with shift tab)
687:<control-000B>
673:<control-0009>
633:The vertical tab is
523:Here is an example:
453:Tab-separated values
448:Tab-separated values
402:), escape character
346:character tabulation
330:software engineering
178:The tab rack from a
54:improve this article
2057:Keyboard technology
1155:. 21 February 2023.
1023:U.S. patent 931,305
1008:U.S. patent 908,221
993:U.S. patent 720,520
388:vertical tabulation
2098:Control characters
1541:
1208:"Arrows โ Unicode"
890:HORIZONTAL TAB KEY
622:CSS property, the
184:
141:
2080:
2079:
2062:Keyboard shortcut
1911:Page Up/Page Down
1724:
1723:
1719:
1706:
1676:
1568:
1081:nickgravgaard.com
1075:Gravgaard, Nick.
925:Indentation style
291:A feature called
278:control or widget
150:(abbreviation of
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16:(Redirected from
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2072:Keyboard mapping
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1169:(5th ed.).
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946:. Archived from
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906:VERTICAL TAB KEY
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478:elastic tabstops
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138:Windows keyboard
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38:
30:
21:
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2067:Keyboard layout
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1952:Carriage return
1935:
1899:Navigation keys
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1254:IBM PC keyboard
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803:(rightward tab)
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696:special symbols
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374:escape sequence
368:and many other
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249:word processing
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12:
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2017:
2015:System request
2012:
2007:
2001:
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1989:Language input
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1984:Numeric keypad
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786:(leftward tab)
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645:1.0 and HTML.
614:property. The
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457:word processor
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381:string literal
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337:
336:Tab characters
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293:tab completion
244:
241:
208:tabulator stop
171:
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128:
127:
42:
40:
33:
26:
9:
6:
4:
3:
2:
2115:
2104:
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2096:
2094:
2093:Computer keys
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110:February 2023
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71: โ
70:
66:
65:Find sources:
59:
55:
49:
48:
43:This article
41:
37:
32:
31:
19:
18:Tab character
2010:Print Screen
1973:
1947:Enter/Return
1237:. Retrieved
1225:
1214:. Retrieved
1202:
1191:. Retrieved
1179:
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1121:. Retrieved
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1080:
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963:
952:. Retrieved
948:the original
938:
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506:<code>
487:
475:
471:Gopher menus
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345:
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284:design). On
274:
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257:
253:text editing
246:
243:Modern usage
236:
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187:
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155:
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144:
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116:
107:
97:
90:
83:
76:
64:
52:Please help
47:verification
44:
2052:Copilot key
2020:Break/Pause
1875:Scroll Lock
1056:www.jwz.org
859:(right tab)
620:-o-tab-size
597:<pre>
582:<pre>
569:<pre>
514:white-space
502:<pre>
348:, which in
323:video games
180:Flexowriter
156:tabular key
2103:Whitespace
2087:Categories
1998:Contextual
1906:Arrow keys
1264:US layout)
1239:2023-08-31
1216:2013-12-13
1193:2013-12-13
1118:dev.w3.org
1061:2020-06-02
977:2011-04-09
954:2011-04-09
931:References
876:(down tab)
825:(left tab)
558:characters
512:attribute
196:typewriter
80:newspapers
2047:Macro key
1979:Space bar
1959:Backspace
1885:Caps Lock
1867:Lock keys
1838:Microsoft
1766:Dead keys
635:
498:	
309:Unix-like
237:tab clear
220:backspace
215:indenting
204:backspace
200:space bar
186:The word
69:"Tab key"
1880:Num Lock
1757:Keyboard
1123:23 March
1086:23 March
913:See also
903:⭿
887:⭾
870:⭳
853:⭲
842:(up tab)
836:⭱
819:⭰
797:⇥
780:⇤
764:⇆
747:↹
726:␋
710:␉
612:tab-size
604:tab-size
580:Outside
560:	
556:	
552:	
548:	
544:	
540:	
536:	
494:	
441:ISO 6429
422:de facto
344:(HT) or
192:tabulate
164:tab stop
160:keyboard
2042:Any key
1940:Editing
1834:Windows
1826:Command
1797:Control
1774:Compose
1258:Windows
655:Unicode
649:Unicode
624:Firefox
567:Inside
516:set to
313:Windows
267:Windows
233:tab set
170:History
158:) on a
145:tab key
94:scholar
1969:Delete
1964:Insert
1890:F-Lock
1811:Option
1714:
1710:
1590:Delete
1547:Insert
1379:Scroll
1369:PrtScn
900:
898:U+2B7F
884:
882:U+2B7E
867:
865:U+2B73
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848:U+2B72
833:
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814:U+2B70
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792:U+21E5
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761:
759:U+21C6
744:
742:U+21B9
723:
721:U+240B
707:
705:U+2409
684:
682:U+000B
670:
668:U+0009
608:WebKit
411:EBCDIC
307:, and
96:
89:
82:
75:
67:
2029:Misc.
1852:Hyper
1842:Super
1830:Apple
1821:AltGr
1815:Apple
1802:Shift
1675:Enter
1391:Break
1386:Pause
1374:SysRq
1234:(PDF)
1211:(PDF)
1188:(PDF)
972:(PDF)
921:(CSV)
659:ASCII
616:Opera
364:. In
350:ASCII
301:Linux
286:macOS
275:every
271:focus
260:field
148:Tab โน
101:JSTOR
87:books
1931:Menu
1916:Home
1847:Meta
1840:) /
1832:) /
1779:Gold
1759:keys
1600:PgDn
1567:Lock
1557:PgUp
1552:Home
1381:Lock
1262:ANSI
1125:2018
1100:See
1088:2018
653:The
639:SGML
550:more
546:some
528:HTML
490:HTML
484:HTML
431:IDEs
392:Ctrl
372:the
354:Ctrl
305:Unix
251:and
235:and
202:and
143:The
73:news
1974:Tab
1926:Esc
1921:End
1807:Alt
1718:Del
1705:Ins
1595:End
1565:Num
1362:F12
1357:F11
1352:F10
1296:Esc
1171:W3C
643:XML
554:tab
542:are
520:).
518:pre
510:CSS
496:or
488:In
409:In
398:or
360:or
328:In
318:In
273:to
247:In
188:tab
154:or
56:by
2089::
1857:Fn
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1347:F9
1340:F8
1335:F7
1330:F6
1325:F5
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1303:F1
1260:,
1116:.
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404:\v
400:^K
386:A
377:\t
362:^I
320:PC
315:.
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98:ยท
91:ยท
84:ยท
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