> For the complete documentation index, see [llms.txt](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_ii_-_opentx_lua_api_programming_guide/included_lua_libraries/io-library.md).

# io Library

- [io.open()](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_ii_-_opentx_lua_api_programming_guide/included_lua_libraries/io-library/io.open.md)
- [io.close()](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_ii_-_opentx_lua_api_programming_guide/included_lua_libraries/io-library/io.close.md)
- [io.read()](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_ii_-_opentx_lua_api_programming_guide/included_lua_libraries/io-library/io.read.md)
- [io.write()](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_ii_-_opentx_lua_api_programming_guide/included_lua_libraries/io-library/io.write.md)
- [io.seek()](https://doc.open-tx.org/opentx-2-3-lua-reference-guide/part_ii_-_opentx_lua_api_programming_guide/included_lua_libraries/io-library/io.seek.md)