System always creates diffident type of temporary cache to make the processing faster. Here is the default list:
Cache Type
1.Addon
2.Manual Cache
3.CategorySet
4.InformationSet
5.Interface Builder
6.Language
7.Model
8.Error Reporting
9.Site Setting
10.URI Manage
11.Web Service
You can clear cache from bellow location:
Admin Panel > Preference > Cache Management
During development you can disable cache from bellow location:
Admin Panel > Preference > Configuration
See also System Cache