| Title | Author(s) | Year | View Count |
 | Obama Lost a Round,' | Chan, YY; Chan, YY | 2009 | 118 |
| 'OBASL: Bottom-up or Top-down; A perspective from HKU' | Prosser, MT; Pomfret, DM; Cunich, PA | 2009 | 186 |
 | Objective assessment of walking environments in ultra-dense cities: Development and reliability of the Environment in Asia Scan Tool-Hong Kong version (EAST-HK) | Cerin, E; Chan, KW; Macfarlane, DJ; Lee, KY; Lai, PC | 2011 | 128 |
| Objective versus perceived walking distances to destinations: Correspondence and predictive validity | McCormack, GR; Cerin, E; Leslie, E; du Toit, L; Owen, N | 2008 | 115 |
| Objective visual thresholds in action and perception | De Wit, MM; Masters, RSW; van der Kamp, GJ | 2009 | 94 |
| Objectively measured light-intensity physical activity is independently associated with 2-h plasma glucose | Healy, GN; Dunstan, DW; Salmon, J; Cerin, E; Shaw, JE; Zimmet, PZ; Owen, N | 2007 | 41 |
| An Observation of the Development of Civil Society in Macao | Leung, KC | 2012 | 60 |
| Occlusion, orthodontic treatment need and demand of young Chinese adults | Chu, CH; Chan, AYY; Cheung, JT; Choy, HB; Ku, CC; Lam, CSN; Lee, KK; Ng, KTY; Wan, HL; Wong, YK | 2006 | 109 |
| Oceanic lithosphere 1. The origin and evolution of oceanic lithosphere: Introduction | Malpas, J; Robinson, P | 1997 | 44 |
| Of gems and rohingyas: Indo-Burmese communities in Yunnan (China) | Egreteau, R | 2010 | 109 |
| OGS or tardive dystonia? | Lee, WY | 1995 | 28 |
| The 'Old' and 'New' of the Buddhist Canon — Some critical remarks | Dhammajoti, KL | 2009 | 94 |
 | On adaptive decision rules and decision parameter adaptation for automatic speech recognition | Lee, CH; Huo, Q | 2000 | 363 |
| On Bare Feet | Lam, ASL | 1998 | 78 |
| On penalty taking: reasons why the penalty taker should ignore the goalkeeper. | van der Kamp, GJ; Masters, RSW | 2008 | 128 |
| On relations between romance of two Jin Dynasties and romance of East and West Jin Dynasty | Kung, M | 2008 | 177 |
| On some properties of the optimally refined proportional sampling strategy | Chan, FT; Chen, TY; Mak, IK; Shen, SM | 1997 | 42 |
| On the Folktales of Gan Jiang and Mo Ye (By Li Daohe) | Cheng, PWM; Kung, M; Luo, H; Chan, TH; Yue, WY | 2009 | 124 |
| On the Poems and Fu from Han-Wei-Six Dynasties Related to the Capital Ye (By Ho Cheung Wing) | Cheng, PWM; Kung, M; Luo, H; Chan, TH; Yue, WY | 2009 | 108 |
| On the relation between action selection and movement control in 5- to 9-month-old infants | van Wermeskerken, M; van der Kamp, J; Savelsbergh, GJP | 2011 | 98 |
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