The traditional application of an LMS is in educational institutions. Learning management systems have been used for several years to deliver courseware in schools and popularize e-learning.
As verbs the difference between cane and crutch. is that cane is to strike or beat with a cane or similar implement while crutch is to support on crutches; to prop up.
Regarding the true difference between push and pull, Hopp and Spearman are right on the money: True pull has an upper limit on WIP. Yes, if you explicitly limit your work in progress (WIP), it is a pull system. If not, it is a push system. It has nothing to do with physical pulling or pushing of material or information.