Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 1234]

$\$ mi	Common namespace for APIs of NVIDIA Advanced Rendering Center GmbH
$o$ base	Namespace for the Base API
$\|$ $o$ Atom32	32-bit unsigned counter with atomic arithmetic, increments, and decrements
$\|$ $o$ Condition	Conditions allow threads to signal an event and to wait for such a signal, respectively
$\|$ $o$ Default_allocator	A default allocator implementation based on global new and delete
$\|$ $o$ Handle	Handle class template for interfaces, automatizing the lifetime control via reference counting
$\|$ $o$ IAllocator	The IAllocator interface class supports allocating and releasing memory dynamically
$\|$ $o$ IInterface	The basic extensible interface
$\|$ $o$ ILogger	The ILogger interface class supports logging of messages
$\|$ $o$ Interface_declare	Mixin class template for deriving new interface declarations
$\|$ $o$ Interface_implement	Mixin class template for deriving interface implementations
$\|$ $o$ Interface_implement_2	Mixin class template for deriving interface implementations from two interfaces
$\|$ $o$ Interface_implement_singleton	Mixin class template for deriving singleton interface implementations, where the reference count is fixed to one
$\|$ $o$ Interface_merger	This mixin merges the implementation of one interface with a second interface
$\|$ $o$ Lock	Lock class implementing a critical region that only one thread can enter at a time
$\|$ $\|$ $\$ Block	Utility class to acquire a lock that is released by the destructor
$\|$ $o$ Plugin	Every plugin must be derived from this class
$\|$ $o$ Std_allocator	An adaptor class template that implements a standard STL allocator
$\|$ $\|$ $\$ rebind	Rebind helper struct to define a new class instance of this allocator template instantiated for the new value type `T1`
$\|$ $o$ String	String class with `char` character type
$\|$ $o$ numeric_traits_base	Base class for the helper class to deduce properties of numeric types defined in this API
$\|$ $o$ numeric_traits	Helper class to deduce properties of numeric types defined in this API
$\|$ $o$ numeric_traits< Sint8 >	Numeric traits specialization for mi::Sint8
$\|$ $o$ numeric_traits< Sint16 >	Numeric traits specialization for mi::Sint16
$\|$ $o$ numeric_traits< Sint32 >	Numeric traits specialization for mi::Sint32
$\|$ $o$ numeric_traits< Sint64 >	Numeric traits specialization for mi::Sint64
$\|$ $o$ numeric_traits< Uint8 >	Numeric traits specialization for mi::Uint8
$\|$ $o$ numeric_traits< Uint16 >	Numeric traits specialization for mi::Uint16
$\|$ $o$ numeric_traits< Uint32 >	Numeric traits specialization for mi::Uint32
$\|$ $o$ numeric_traits< Uint64 >	Numeric traits specialization for mi::Uint64
$\|$ $o$ numeric_traits< Float32 >	Numeric traits specialization for mi::Float32
$\|$ $o$ numeric_traits< Float64 >	Numeric traits specialization for mi::Float64
$\|$ $o$ Uuid	A 128 bit representation of a universally unique identifier (UUID or GUID)
$\|$ $\$ Uuid_t	Class template for a compile-time representation of universally unique identifiers (UUIDs or GUIDs)
$\$ math	Namespace for the Math API
$o$ functor	Namespace for basic math functors in the Math API
$\|$ $o$ Operator_equal_equal	Functor for the equality comparison operator, `==`
$\|$ $o$ Operator_not_equal	Functor for the inequality comparison operator, `!=`
$\|$ $o$ Operator_less	Functor for the less-than comparison operator, `<`
$\|$ $o$ Operator_less_equal	Functor for the less-than-or-equal comparison operator, `<=`
$\|$ $o$ Operator_greater	Functor for the greater-than comparison operator, `>`
$\|$ $o$ Operator_greater_equal	Functor for the greater-than-or-equal comparison operator, `>=`
$\|$ $o$ Operator_plus	Functor for the plus operator, `+`
$\|$ $o$ Operator_minus	Functor for the minus operator, `-`, unary and binary
$\|$ $o$ Operator_multiply	Functor for the multiplication operator, `*`
$\|$ $o$ Operator_divide	Functor for the division operator, `/`
$\|$ $o$ Operator_and_and	Functor for the logical and operator, `&&`
$\|$ $o$ Operator_or_or	Functor for the logical or operator, `\|\|`
$\|$ $o$ Operator_xor	Functor for the xor operator, `^`
$\|$ $o$ Operator_not	Functor for the logical not operator, `!`
$\|$ $o$ Operator_pre_incr	Functor for the pre-increment operator, `++`
$\|$ $o$ Operator_post_incr	Functor for the post-increment operator, `++`
$\|$ $o$ Operator_pre_decr	Functor for the pre-decrement operator, `--`
$\|$ $\$ Operator_post_decr	Functor for the post-decrement operator, `--`
$o$ general	Namespace for generic functions in the Math API
$o$ Bbox_struct	Storage class for an axis-aligned N-dimensional bounding box class template of fixed dimension
$o$ Bbox	Axis-aligned N-dimensional bounding box class template of fixed dimension
$o$ Spectrum_struct	Generic storage class template for a Spectrum representation storing three floating point elements
$o$ Color	Standard RGBA color class with floating point elements and operations
$o$ Matrix_struct	Storage class for a NxM-dimensional matrix class template of fixed dimensions
$o$ Matrix_struct< T, 1, 1 >	Specialization for 1x1-matrix
$o$ Matrix_struct< T, 2, 1 >	Specialization for 2x1-matrix
$o$ Matrix_struct< T, 3, 1 >	Specialization for 3x1-matrix
$o$ Matrix_struct< T, 4, 1 >	Specialization for 4x1-matrix
$o$ Matrix_struct< T, 1, 2 >	Specialization for 1x2-matrix
$o$ Matrix_struct< T, 2, 2 >	Specialization for 2x2-matrix
$o$ Matrix_struct< T, 3, 2 >	Specialization for 3x2-matrix
$o$ Matrix_struct< T, 4, 2 >	Specialization for 4x2-matrix
$o$ Matrix_struct< T, 1, 3 >	Specialization for 1x3-matrix
$o$ Matrix_struct< T, 2, 3 >	Specialization for 2x3-matrix
$o$ Matrix_struct< T, 3, 3 >	Specialization for 3x3-matrix
$o$ Matrix_struct< T, 4, 3 >	Specialization for 4x3-matrix
$o$ Matrix_struct< T, 1, 4 >	Specialization for 1x4-matrix
$o$ Matrix_struct< T, 2, 4 >	Specialization for 2x4-matrix
$o$ Matrix_struct< T, 3, 4 >	Specialization for 3x4-matrix
$o$ Matrix_struct< T, 4, 4 >	Specialization for 4x4-matrix
$o$ Matrix	NxM-dimensional matrix class template of fixed dimensions
$o$ Spectrum	Spectrum with floating point elements and operations
$o$ Color_struct	Generic storage class template for an RGBA color representation storing four floating points elements
$o$ Vector_struct	Generic storage class template for math vector representations storing `DIM` elements of type `T`
$o$ Vector_struct< T, 1 >	Specialization for dimension 1 to create x member
$o$ Vector_struct< T, 2 >	Specialization for dimension 2 to create x and y member
$o$ Vector_struct< T, 3 >	Specialization for dimension 3 to create x, y, and z members
$o$ Vector_struct< T, 4 >	Specialization for dimension 4 to create x, y, z, and w members
$\$ Vector	Fixed-size math vector class template with generic operations