计算机系统研究组（Computer Systems Research Group，CSRG）是一个位于柏克莱加州大学的研究小组，由Defense Advanced Research Projects Agency（美国国防部高级研究规划署）资助，致力于改进AT&TUnix操作系统。

1970年代，小组由AT&T许可，获得了源码，但后来该操作系统变得非常流行，AT&T一下子提高了许可费用。这就使问题出现了争论，Computer Systems Research Group随后下决心，自力更生将所有来自AT&T的源代码替换掉。

CSRG may also refer to China South Locomotive and Rolling Stock Industry (Group) Corporation

or Chauchat Sutter Ribeyrolles Gladiator World War I era machine gun.

The Computer Systems Research Group (CSRG) was a research group at the University of California, Berkeley that was dedicated to enhancing AT&T Unix operating system and funded by Defense Advanced Research Projects Agency.