Sharepoint Calendar needs to add catagory via email (if/else?)

Hello 

I have a sharepoint calendar that my team use to send meeting invites too via email

these emails do not pass catagories along and these must be added manually so i need to either

A) Pass a catagory with an email and have sharepoint pick that up (no idea how to do that)

B) use the title of the meeting invite to catagorise it in sharepoint 

for option B) if i create an If statement i can get a calculated field to display some text

=IF([Title]="Hack*" Then "Hackathon") 

but i have 7 different categories and my VB skills are no good for getting an IF else statement to work in Sharepoint 

i have some java that can pick up this field and then add a colour to the entry (which is all i really want)

Thanks for your help