Appointment letter for Marketing or sales department, Technology or IT & for HR department?

I am the junior HR in an IT company. Which is mainly into school related software development. I have seen that the appointment letter which are given to personnel in any department are very similar with minor changes. So any senior here can help me for the different appointment letter for Marketing or sales department, Technology or IT & for HR department. I will be really Thankful.

Appointment Letters contain, briefly yet precisely, the Genetral Terms & Conditions of Employment- as Employment is a Contract- and hence must mention the Offered as well as Accepted Terms of Employment.
The Appointment Letters vary so far as the diffeerence in Emoluments, Designation (Hierarchy) , Joining Date, Grade Structure, Reporting etc are concerned. The Format as such remain or appear to be one and the same in respect of a Particular Organizations for the Codified Service Rules, The Code of Conduct inter alia are concerned. Standardized Format is easy and Simple for reference and Record purposes. Please ponder over what NOVEL Feature you have in mind.
Kritarth Team
26 Nov 2018, Kritarth Consulting Private Limited