AVR-GCC

Hi,
ich hab mal 'ne Frage zum AVR-GCC. In den Dateien von GCCTEST gibt es 
etwas das u08 heißt. Was bedeutet das?
Hier z.B. der Source von Gcctest1:

int main( void )
{
   u08 led, i, j, k;

   outp(0xff,DDRB);            /* use all pins on PortB for output */

   led = 1;                    /* init variable representing the LED 
state */

   for (;;) {
       outp(~led, PORTB);      /* invert the output since a zero means: 
LED on */
       led <<= 1;              /* move to next LED */
       if (!led)               /* overflow: start with Port B0 again */
           led = 1;
       for (i=0; i<255; i++)   /* outer delay loop */
           for(j=0; j<255;j++) /* inner delay loop */
               k++;            /* just do something - could also be a 
NOP */
   }
}


Bedeutet das unsigned Byte?

Danke
Markus