Service 100: Plied between Serangoon interchange and Ghim Moh terminal. No route change.
Service 101: Number re-used from Feb 2004, from the re-numbering and amendment of service 328.
Service 103: Plied between Jln Kayu terminal and Buona Vista terminal, via Outram Rd, Tiong Bahru Rd and Margaret Dr. Shortened to New Bridge Rd terminal in 1993, with the amendments of services 5 and 32. Shortened again in Dec 2003 to Serangoon interchange and merged with services 378 and 379.
Service 104: Loop service between Serangoon interchange and Upp Cross St, via Boundary Rd, Lor Chuan, Braddell Rd, Thomson Rd, Keng Lee Rd/Kampong Java Rd, Bt Timah Rd, Scotts Rd, Paterson Rd, Irwell Bank Rd/Hoot Kiam Rd, River Valley Rd, Clemenceau Ave, Havelock Rd, Upp Pickering St and Upp Cross St. Amended to terminate at New Bridge Rd terminal in 1992 via New Bridge Rd, and amended to ply Ang Mo Kio Ave 1 and Bishan Rd instead of Lor Chuan. Merged with service 134 in 1993 to become service 54.
Service 105: Plied between Serangoon interchange and Clementi interchange. Extended to Jurong East interchange in 1993. Amended to ply Serangoon Ave 2 and Ave 3 when merged with service 312, and Lor Chuan instead of Ang Mo Kio Ave 1 and Bishan Rd, when service 104 was amended. Also in the same year, amended to ply Queensway and C'wealth Ave instead of Ulu Pandan Rd and Clementi Rd.
Service 106: Plied between Serangoon interchange and Bt Batok interchange. Shortened to Marina Centre terminal in July 2003.
Service 107: Plied between Serangoon interchange and Shenton Way. In March 1997, introduced service 107X to loop at Marina Centre. Service 107X Saturdays first bus departure time brought forward to afternoon. Route change in Kallang Bahru area in May 2003. In Nov 2003, extended to Hougang Central interchange.
Service 111: Plied between Hougang South interchange and Ghim Moh terminal. Extended to Hougang Central interchange in 1994. Shortened to Marina Centre in July 2003.
Services 112 and 113: Need I say?

Service 118: Duplicated service 111 between Hougang South interchange and Orchard Blvd/Orchard Rd. Loop at Tomlinson Rd. Withdrawn in 1990.
Service 119: Need I say?

Service 122: Formerly plied between Bt Batok interchange and St. Michael's terminal. Later plied between Buona Vista terminal and St. Michael's terminal via C'wealth Ave, Queensway, Alexandra Rd, River Valley Rd, Hill St, Victoria St, Lavender St and Balestier Rd. In the return journey, plied Jln Besar, Bencoolen St and Bras Basah Rd. Withdrawn in 1993.
Service 123: Loop service which plied between St. Michael's terminal and New Bridge Rd terminal, via Balestier Rd, Moulmein Rd, Newton Rd, Scotts Rd, Orchard Rd, Clemenceau Ave, Havelock Rd, Outram Rd, Neil Rd and Eu Tong Sen St. (loop at the bus stop outside the terminal). In 1992, amended to ply between New Bridge Rd terminal and Tomlinson Rd, with the amendment of service 124. In 1993, merged with service 14 and amended to ply between Bt Merah interchange and Bt Purmei Ave.
Service 124: Loop service which plied between St. Michael's terminal and Telok Blangah Rise. Used to ply PIE, Whitley Rd and Stevens Rd, amended to ply Moulmein Rd and Newton Rd in 1992. Extended to Bt Merah interchange in 1993. Amended to loop at Telok Blangah Dr in Nov 2003.
Service 125: Plied between Bt Merah interchange and St. Michael's terminal, via current service 131 route to Stamford Rd, continued via Victoria St, Middle Rd, Selegie Rd, Bt Timah Rd, Kampong Java Rd, Thomson Rd, Moulmein Rd and Balestier Rd. In the return journey, it plied Bencoolen St and Bras Basah Rd. In 1993, amended to become a daytime weekdays and Saturdays loop service, plying between St. Michael's and Shenton Way, via Balestier Rd, Lavender St, Jln Besar, Ophir Rd, Beach Rd, Connaught Dr, Collyer Quay and Raffles Quay. In 2000, merged with service 20 and amended to ply between St. Michael's terminal and Sims Dr.