View source for History of Services 1 - 10

==Service 1 (1971 - 1989)==
{| class="wikitable" style='text-align:center;'
|-
!style={{CSS/PAST|s=|t=}}|Operator
!style={{CSS/PAST|s=|t=}}|Year
!style={{CSS/PAST|s=|t=}}|Date
!style={{CSS/PAST|s=|t=}}|Service changes
|-
|rowspan="2"|'''ABS'''
|'''1971'''
|'''11 April'''
|Introduced between Changi Pt Ter and Delta Circus Ter under 1971 Bus Reorganisation.
|-
|'''1973'''
|'''11 March'''
|Amended to ply Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd to one-way traffic.
|-
|rowspan="17"|{{SBS}}
|rowspan="2"|'''1974'''
|'''1 December'''
|Amended to ply New Upp Changi Rd, Bedok Plain, Bedok Hts, Upp East Coast Rd and Bedok Rd.
|-
|'''8 December'''
|Amended to ply the extended Robinson Rd, skipping Market St.
|-
|rowspan="5"|'''1975'''
|'''2 February'''
|Amended to ply Tiong Bahru Rd and the extended Zion Rd towards Delta Circus Ter with the partial conversion of Kim Seng Rd and Outram Rd to one-way traffic.
|-
|'''2 March'''
|Amended to ply Sims Ave towards Changi Pt Ter with the conversion of Geylang Rd to one-way traffic.
|-
|'''25 May'''
|Amended to ply Bedok Wk and New Upp Changi Rd, skipping Bedok Hts and Upp East Coast Rd.
|-
|{{TBC}}
|Amended to new Changi Pt Ter.
|-
|'''14 November'''
|Amended to ply New Upp Changi Rd, skipping Bedok Plain and Bedok Wk.
|-
|'''1976'''
|'''15 February'''
|Serves new staggered bus stop between Bank of India and Hong Leong Holdings along Robinson Rd.
|-
|rowspan="3"|'''1979'''
|'''11 February'''
|Amended to ply the extended Shenton Way towards Delta Circus Ter, skipping Parsi Rd and Anson Rd.
|-
|'''14 October'''
|Amended to ply Sims Ave East towards Changi Pt Ter with the conversion of Changi Rd to one-way traffic.
|-
|'''11 November'''
|Amended to Delta Fringe Car Pk.
|-
|'''1980'''
|'''20 January'''
|Amended to ply Spottiswoode Pk Rd with the partial conversion of Cantonment Rd to one-way traffic.
|-
|rowspan="3"|'''1981'''
|'''15 June'''
|Amended to ply Loyang Ave and Loyang Way with the partial closure of Upp Changi Rd.
|-
|'''11 October'''
|Serves new staggered bus stop outside Tunas Bldg along Anson Rd, skipping the bus stop outside Intl Plaza.
|-
|'''8 November'''
|Revised to operate on weekdays and Saturdays only.
|-
|'''1987'''
|'''6 April'''
|Skips removed bus stop before College Rd along Outram Rd.
|-
|'''1989'''
|'''5 November'''
|Discontinued.
|}