# Other Information Procedures

The following procedures print information about the current state of Magma.

## `ShowMemoryUsage()`

(Procedure.) Show Magma’s current memory usage.

## `ShowIdentifiers()`

(Procedure.) List all identifiers that have been assigned to.

## `ShowValues()`

(Procedure.) List all identifiers that have been assigned to with their values.

## `Traceback()`

(Procedure.) Display a traceback of the current Magma function invocations.

## `ListSignatures(C): Cat`

```magma
Isa    : BoolElt                      Default: true
Search : MonStgElt                    Default: "Both"
ShowSrc: BoolElt                      Default: false
```

List all intrinsic functions, procedures and operators having objects from category $C$ among their arguments or return values. The parameter `Isa` may be set to `false` so that any categories which $C$ inherit from are not considered. The parameter `Search`, with valid string values `Both`, `Arguments`, `ReturnValues`, may be used to specify whether the arguments, the return values, or both, are considered (default both). `ShowSrc` can be used to see where package intrinsics are defined. Use `ListCategories` for the names of the categories.

## `ListSignatures(F, C): Intrinsic, Cat`

```magma
Isa    : BoolElt                      Default: true
Search : MonStgElt                    Default: "Both"
ShowSrc: BoolElt                      Default: false
```

Given an intrinsic $F$ and category $C$, list all signatures of $F$ which match the category $C$ among their arguments or return values. The parameters are as for the previous procedure.

## `ListCategories()`

## `ListTypes()`

Procedure to list the (abbreviated) names for all available categories in Magma.