How to Say "computer science" in Spanish
The Spanish word for “computer science” is “informática” — A2 level. This is a very common word in everyday Spanish.

Examples
Mi hermano estudia informática en la universidad.
My brother is studying computer science at the university.
Hoy tenemos clase de informática en el laboratorio.
Today we have a computing class in the lab.
La seguridad informática es vital para las empresas modernas.
Cybersecurity is vital for modern companies.
Always use 'La'
This word is always feminine. Even if you are talking about the field in general, you should include the word 'la' (the), as in 'La informática es fascinante' (Computing is fascinating).
Science vs. Career
When talking about the major or degree you are pursuing, use 'informática' rather than 'computación' in Spain, though both are understood.
Confusing the person with the subject
Mistake: “Trabajo como informática.”
Correction: This is only correct if you are a woman. If you are a man, you must say 'Trabajo como informático.' Use 'informática' only for the subject or a female professional.
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