| USSR | Union of Soviet Socialist Republics | 苏维埃社会主义共和国联 |
| USSR | Union of Stupid Spasticated Retards | 愚蠢的迟缓者联盟 |
| USSR | Ultra Simple Skirmish Rules | 超简单的Skirmish规则 |
| USSR | Under Sorrowful Supervision Relationship | 在悲伤的监督关系下 |
| USSR | United States Smoking Repression | 美国吸烟抑制 |
| USSR | Union of Socialist Soviet Republics | 社会主义苏维埃共和国联盟 |
| USSR | Union of Soviet Socialist Republics (now Commonwealth of Independent States) | 苏维埃社会主义共和国联盟（现独立国家联合体） |
| USSR | Underground Security Systems Research | 地下安全系统研究 |
| USSR | Uninterrupted Sustained Silent Reading (education) | 不间断持续默读（教育） |
| USSR | Uninterrupted Sustained Silent Reading | 不间断持续默读 |
| USSR | Unsavory Soviet Stupid Rats | 不安全的苏联蠢鼠 |