This mainly depends on what kind of computer it is. Generally speaking, there will be some radiation on the back of the desktop host and monitor (especially the old CRT), and the hot air emitted from the computer will be blown to the back by the heat exhaust fan, which has a great influence on the position of the back. For monitors, the back radiation of products from well-known brand manufacturers is still relatively small, because they are all equipped with all-metal radiation shields, but the products from relatively cheap unknown brand manufacturers will have relatively large back radiation. For the main chassis, there is generally not much radiation on the back, because there are many radiation-proof honeycomb holes and the metal is very thick, but the protection for the air outlet of the power supply fan and the chassis fan is low, ensuring smooth heat dissipation. For the baffle of cards (such as video cards, sound cards, network cards and other devices), electromagnetic leakage is more likely to occur at the external device interface of the card. In short, if the back of the computer rushes directly to your body for a long time, there is a great chance that it will be polluted by excessive radiation and exhaust gas, whether it is the back or the front. It is better to avoid it as much as possible.
For an enterprise that can't provide each employee with an independent work area, the best way is to stagger the desks and chairs. The computer position of each desk is separated from the seat of the previous employee by half a desktop, and the desk and chair of the previous employee are separated from the desk and chair space of the middle employee, so that the influence of the computer on the previous employee and the previous employee will be minimized (the influence of radiation and exhaust gas is greatly limited by the distance, and the radiation will be sharply weakened beyond a certain distance). Employees who are located behind other people's computers, it is best not to sit in front of other people's computers, and they must be staggered. If possible, they can make a simple partition (just use cardboard with aluminum film) to separate the computer behind from their own position.