Don't understand types of calendars and origination - Microsoft Community

when open office 2013 calendar see 

i understand "calendar - archive" don't understand differences of others. why calendar , birthdays have both " - outlook" , "- outlook data file" versions. 

when try difference between - outlook vs - outlook data they appear near duplicates (there differences).

• what outlook vs outlook data and there data come from?
• do want both - outlook , - outlook data versions? if so, why

hi jerry,

the outlook , outlook data file you're seeing right beside birthdays , calendar, files saved both on computer , on mail server. know more difference of these two, can refer article.

let know if link provided helpful , we'll answer more of questions.

Office / Outlook / Windows 10 / Office 2013