relating to or constituting archives.

production and discharge of something.

achieved or maintained by careful and deliberate effort. To focus on learning something usually at school.

Not present; not available. To fail to understand someone's message.

moving from higher to lower level. To come down from a higher position suddenly.

optical instrument designed to make distant objects appear nearer, containing arrangement of lenses, or of curved mirrors and lenses. slide or cause to slide into itself, so that it becomes smaller.

thing characteristic of its kind. be illustrated or exemplified.

concerned with or involving theory of subject or area of study rather than its practical application.

Without being seen or noticed.

thing predicted. Statements of what will happen next.

Of a light that cannot be seen, but can be felt. infrared region of spectrum.

pattern of lines or rays radiating from central object or source of light.

Sharing the same opinion or reach a decision.

possessions collectively. Particular qualities that people or some things have.

To think or accept that something is true.