1. Flowchart Symbols DFD Symbols Processes Input/Output Storage
Miscellaneous
Terminator (start/end)
Computer
Document
disk
Paper file
Off page connector
Display
Manual
Batch total
Tape storage
On page connector
Computer
entry
DFD Symbols
External
Entity
Internal Entity
Process
Data Store
Data Flow

2. DFD Arrow Rules Entity or Log Process Create Filename
File (for manual “filing”)
Filename
Entity or
Process
Read
Check
Use
Verify
Access
Filename
Entity or
Process
Update
Post
Record
Refile (for manual “filing”)
Filename