You say, "Trabaja por una empresa computadora."
computer in Spanish is ordenador -- la computadora
"Who works here" in Spanish would be "¿Quién trabaja aquí?"
Él trabaja.
informática
ratón...
computadora
ella con trabajo
To say 'I want a computer' in Spanish, you would say 'Yo quiero una computadora.'
Pls note that Compania is for a company as in a business company where compañia is with company as in someone with you.
"Log off the computer" in Spanish is "Salir de la sesion de computadora"
La empresa
You have to say: Usted trabaja?