SED help needed

Could someone please tell me the command to deleting a line with a specific word and also deleting all lines below this line? I want this to be done without opening the file itself using SED in HP Unix.

e.g. I have a text file input.txt and with 4 lines of text below:

John 123 A--G
Chris 190 C--T
Mat 098 F--K
Mike 674 B--N
Pat 838 L--U

I want to delete the line which has string "098" and all lines below this line to look like the below:

John 123 A--G
Chris 190 C--T

not really easy, in this case try
sed '/space098space/,$d' inputfile >outputfile
NOTA space is to replace by a space
NOTA this works only in this case, assumed you want delete all
after ' 098 '

Thanks iribach!
It worked!

Could someone tell me how to make a Korn Shell to do the below:

I have the files below with the same format (different data) as mentioned previously and I want a shell to run "sed '/098/,$ d' filename" on all of the files in the directory.

list20051001.txt
list20051002.txt
list20051003.txt
...
list20051031.txt

a) mkdir savedfiles
b) cp list2005* savedfiles
c) for file in list2005*
do sed WHATyouWANT savedfiles/$file >$file
done