By definition any work performed in the running of a business but not pertaining to the actual sales or service but the documentation, facilitation and management of the same is termed is administrative work.

Anything from filing to answering phones to typing to bookkeeping can be termed as administrative work. Most can be done by everyone.

Here are some of the jobs which involve administrative work. It should be evident what type of work these people perform e.g accounting clerks perform accounting entries, bookkeeping etc.

Accounting clerk
Adjustment clerk
Answering Service Operator
Auditing Clerk
Bill & Account Collector
Billing, Cost or Rate Clerk
Billing, Posting or Calculating Machine Operator
Bookkeeping Clerk
Brokerage Clerk
Central Office Operator
Communication Equipment Operator
Correspondence Clerk
Court Clerk
Credit Authorizer
Credit Checker
Directory Assistance Operator
Executive Secretary
File Clerk
Gaming Cage Worker
Information & Record Clerk
Information Clerk
Legal Secretary
License Clerk
Loan Interviewer
Mail Clerk
Mail Machine Operator
Marking Clerk
Medical Secretary
Municipal Clerk
New Accounts Clerk
Office Clerk
Order Clerk
Order Filler
Payroll & Timekeeping Clerk
Postal Service Clerk
Postal Service Mail Carrier
Postal Service Mail Processor
Procurement clerk
Receptionist
Secretary
Statement Clerk
Stock Clerk
Switchboard Operator
Teller
Warehouse Clerk
Word Processor or Typist