How does the author acknowledge the viewpoint of people who might not agree that colossus was the first computer

Colossus is described as a programmable computer is used to trace the old battles about "First computer" and to find the former secrecy about it.

Explanation:

Colossus does mathematical operations than counting and executed a program and performed discrete operations. It is used by the British code breakers in cryptanalysis of the Lorenz Cipher.

The colossus machines were kept secret in the mid period and plans to develop them is a part of maintaining the secret of the project.

a, b, and c are all correct.

it is an infinitive phrase with a subject.