in succession (?.)
- by stages
- consecutively
- hand running
- hierarchically
- in Indian file
- in a chain
- in a line
- in a row
- in a series
- in column
- in file
- in order
- in sequence
- in series
- in single file
- in turn
- progressively
- running
- sequentially
- serially
- seriatim
- step by step
- successively
- turn about
