此编程语言列表按字母顺序列出了知名编程语言,包括当前使用的和以前使用过的编程语言,BASIC的方言、深奥的编程语言和标记语言除外。
- IBM Basic assembly language
- IBM HAScript
- IBM Informix-4GL
- IBM RPG
- ICI
- Icon
- Id
- IDL
- Idris
- IMP
- Inform
- INTERLISP
- Io
- Ioke
- IPL
- Inkling
- IPTSCRAE
- ISLISP
- ISPF
- ISWIM
- Q (equational programming language)
- Q (programming language from Kx Systems)
- Qalb
- QtScript
- QuakeC
- QPL
- T
- TACL
- TACPOL
- TADS
- TAL
- Tcl
- Tea
- TECO
- TELCOMP
- TeX
- TEX
- TIE
- Timber
- TMG, compiler-compiler
- Tom
- TOM
- TouchDevelop
- Toi
- Topspeed
- TPU
- Trac
- TTM
- T-SQL
- Transcript
- TTCN
- Turing
- TUTOR
- TXL
- TypeScript
- Turbo C++
- X#
- X10
- XBL
- XC (exploits XMOS architecture)
- xHarbour
- XL
- Xojo
- XOTcl
- XPL
- XPL0
- XQuery
- XSB
- XSharp
- XSLT – see XPath
- Xtend
- Z notation
- Zeno
- Zig
- ZOPL
- Zsh
- ZPL