char

Usually signed 8 bit integer

Built-in C++ data type

int1

Signed 8 bit integer

May not be same as char

int2

Signed 16 bit integer

.

int4

Signed 32 bit integer

.

int8

Signed 64 bit integer

Reserved for future use

byte

Unsigned 8 bit integer

.

uint1

Unsigned 8 bit integer

Same as byte

uint2

Unsigned 16 bit integer

.

uint4

Unsigned 32 bit integer

.

uint8

Unsigned 64 bit integer

Reserved for future use

float4

32 bit IEEE floating point

VMS variant also called "R4"

float8

64 bit IEEE floating point

.

float16

128 bit IEEE floating point

Reserved for future use