A more thorough explanation:

Term: Salvo
Definition: Salvo means "safe" in Latin. In history, it was used in deeds to mean "excepting" or "saving". It can also mean "safely".
Examples:

• He was the only one who survived the accident, salvo him.
• The company decided to lay off all employees, salvo the ones who had been there for more than 10 years.
• The soldiers fired a salvo of bullets to scare off the enemy.

The first two examples illustrate the historical use of salvo in deeds, where it was used to indicate an exception or a saving clause. The third example shows the use of salvo to mean a simultaneous discharge of weapons, which is a common usage in military contexts.