Please also be aware that many smartphones have the functionality to block unknown numbers. If the person you are calling has enabled 'block unknown numbers' on their phone, you will not be able to call them. Some network carriers and countries do not allow you to hide your number. If you have followed all the below steps and your number is still showing, you should check with your mobile network if they allow this feature. 1. Tap Phone.
In accounting and in planning labor productivity in the USSR and other socialist countries, value (cost) measurement is the method most widely used to determine the existing level, dynamics, growth rates, and indexes of the productivity of labor at various enterprises and for various periods of time.
Productivity describes various measures of the efficiency of production. A productivity measure is expressed as the ratio of output to inputs used in a production process, i.e. output per unit of input. Productivity is a crucial factor in production performance of firms and nations.