| tabs | [ -n|-a|-a2|-c|-c2|-c3|-f|-p|-s|-u]
      [+m[n]] [-Ttype] | 
  
    | tabs | [ -Ttype] [+[n]]
      n1[,n2,...] | 
The tabs utility displays a series of characters that
  first clears the hardware terminal tab settings and then initializes the tab
  stops at the specified positions and optionally adjusts the margin.
The phrase "tab-stop position N" means that, from the
    start of a line of output, tabbing to position N shall cause the next
    character output to be in the (N+1)th column on that line.
The following options are supported:
  - -n
- Specifies repetitive tab stops separated by a uniform number of columns,
      n, where n is a single digit
      decimal number. The default usage of tabswith no
      arguments is equivalent totabs-8. When-0is used, the
      tab stops are cleared and no new ones set.
- -a
- Assembler, applicable to some mainframes. Equivalent to
      tabs1,10,16,36,72 .
- -a2
- Assembler, applicable to some mainframes. Equivalent to
      tabs1,10,16,40,72
- -c
- COBOL, normal format. Equivalent to tabs1,8,12,16,20,55
- -c2
- COBOL, compact format (columns 1 to 6 omitted). Equivalent to
      tabs1,6,10,14,49
- -c3
- COBOL, compact format (columns 1 to 6 omitted), with more tabs than
      -c2. Equivalent totabs1,6,10,14,18,22,26,30,34,38,42,46,50,54,58,62,67
- -f
- FORTRAN. Equivalent to tabs1,7,11,15,19,23
- -p
- PL/1. Equivalent to tabs1,5,9,13,17,21,25,29,33,37,41,45,49,53,57,61
- -s
- SNOBOL. Equivalent to tabs1,10,55
- -Ttype
- Indicates the type of terminal.
- -u
- Assembler, applicable to some mainframes. Equivalent to
      tabs1,12,20,44
TheCOLUMNS and TERM environment
  variables affect the execution of tabs as described in
  environ(7).
The -T option overrides
    TERM. If neither TERM nor
    the -T option are present,
    tabs will fail.
The tabs utility exits 0 on success,
  and >0 if an error occurs.
The tabs utility conforms to IEEE Std
  1003.1 (“POSIX.1”).
A tabs utility first appeared in PWB UNIX. This
  implementation was introduced in NetBSD 6.0.