How to spool the data into notepad

what is spool?
stores query results in a file,or optinally send the file to printer.

cmd>prompt or create file as .bat file

c:\spool/spool.bat

echo off
@echo "##########SPOOL ##################"
sqlplus scott/tiger@omkara @C:\spool\spool.SQL
@echo on;

PAUSE
Exit;

C:\spool\spool.SQL

set pagesize 1000;
set linesize 1000;
spool C:\spool\spool.txt --data spool into the spool.txt file automatically
select *from emp;
spool off;
quit
/