what is a "bootloader"?

> Hi all,
>
> Just uploaded a new ROMzap if anyones interested.
>
> --
> Best regards
>
> Tony
>
> http://www.picnpoke.com
> mailto:sales@picnpoke.com
>
> ** Free beginners experimenter pack included ***
> 2 X 20 LCD, 7 seg, Relay, LED, Switch,
> Serial EEPROM, Trimpot, and Project Book