# Basic System Variables

These are the available TERR basic system variables. See each function's help topic in the TERR Language Reference for more information.

Variable name | Title description
--- | ---
`.Machine` | Machine Arithmetic Constants
`.Platform` | Platform Specific Variables
`.Random.seed` | Control Random Number Generator
`as.null` | The Null Object
`as.null.default` | The Null Object
`is.null` | The Null Object
`NULL` | The Null Object
`R.version` | Version Information
`R.Version` | Version Information
`R.version.string` | Version Information
`RNG` | Control Random Number Generator
`RNGkind` | Control Random Number Generator
`RNGversion` | Control Random Number Generator
`set.seed` | Control Random Number Generator
`version` | Version Information