- two sleeper tamping car
- two-slit diffraction
- Two Solitudes
- Two-Sorted Type Theory
- Two Sparrows and One Rabbit
- two-spectrum binary
- two-sphere model
- two spheres electric field meter
- two-spotted leaf beetle
- two squares theorem
- two-stack machine
- two-stage
- two stage acceleration
- two-stage acceleration
- two-stage estimate
- two-stage estimator
- two-stage grinding- classification circuit
- two-stage growth model
- two-stage least squares
- two-stage least squares method
- two-stage method
- two-stage problem
- two-stage programming
- two stage program with recourse
- two-stage sampling