This next section is designed to introduce you to:
KSpread can be started one of three ways:
You can select KSpread through the system menu by following the KDE Application menu Applications->Office->KSpread
If you are in a terminal program (Konsole, Xterm, etc.), you can type: kspread &
Or
kspread filename &
Using Konqueror, you can click on your data file (KSpread documents normally end in .ksp but it's not required). This will automatically start KSpread showing the last edited table of the sheet.