- Bool
- break
- catch
- Category
- Company
- continue
- Customer
- Date
- Diary
- else
- false
- Float
- for
- Generic
- if
- Inbox
- Integer
- Invoice
- License
- Message
- Priority
- return
- String
- struct
- this
- throw
- Ticket
- Time
- true
- try
- User
- Void
- while
- the name of HTML objects and event handlers
- the name of built-in CRMScript classes and functions (can’t be redefined or used by you)