SST

SST stands for Self-service training, which is a training method that allows enterprise users to organize training activities freely with the help of training CD software. The idea is to use a computer or VCD machine and TV to organize training activities anytime, anywhere, in any form, for any number of people, and any number of times

SST is also an abbreviation for "Special treatment" in the context of stock trading. When the stock trading of a listed company is under special treatment, the following rules should be followed: (1) The daily price limit of the stock is limited to 5%

SST is also used in statistics, where it stands for Sum of Squares Total. SST is the total variation in the response variable, and it is the sum of the squared deviations of each data point from the mean of the response variable. It is used in the calculation of the coefficient of determination (R²) in regression analysis.