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Prepositions with nouns

On CD or Of CD?

Use on CD to mean stored, released, or available in the CD format. Of CD is not a standard combination in this meaning.

Quick answer

Which form is correct?

Use on CD when talking about music, software, or other material available in CD format. Of CD is generally not idiomatic unless of introduces a different relationship, such as part of a longer noun phrase.

The album is available on CD and vinyl.
We bought the software on CD.
The recordings were released on CD in 2004.

Choose the pattern by meaning

These forms are not interchangeable. Choose the construction by meaning, not by which preposition appears most often.

1
on CD

Talking about format or medium

Use on CD for content stored, sold, or released in CD format.

The course is available on CD.
I still have the game on CD.
2
release something on CD

Describing publication format

Use on CD after verbs such as release, issue, or publish.

The band released the concert on CD last year.
They issued the archive recordings on CD.
3
copy something to CD

Talking about transfer or storage

Use to CD when moving files or recordings onto a disc.

She copied the photos to CD.
We saved the backup to CD.

See the difference in context

The same subject can take different constructions because each sentence answers a different question.

Construction
Example
Meaning
on CD
The dictionary comes on CD.
Correct for material available in CD format.
of CD
the cover of the CD
Possible only when of shows possession or relationship, not format.
on a CD
I found the files on a CD.
Refers to a specific physical disc.
in CD format
The manual is available in CD format.
Another natural way to describe the medium.

Common mistakes

Some combinations appear in real text but do not mean what learners often assume.

Using of CD for format

Do not use of CD to mean available in CD format.

✕ The album is of CD. ✓ The album is on CD.

Missing the article with a specific disc

Use a or the when referring to one physical CD.

✕ The files are on CD on my desk. ✓ The files are on a CD on my desk.

Confusing on CD and to CD

On CD describes format. To CD describes movement or transfer.

✕ She copied the files on CD. ✓ She copied the files to CD.

Quick practice

Choose the expression that matches the intended meaning.

1. The old training program is available ___ CD.
2. We copied the recordings ___ CD for storage.
3. I found the photos on ___ CD in the office.

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Frequently asked questions

Is of CD ever correct?

It can appear in phrases like the label of the CD, where of shows a relationship. It is not used to mean in CD format.

Can I say on a CD instead of on CD?

Yes. On a CD refers to a specific disc, while on CD refers to the format in general.

Is on CD still standard English?

Yes. It is still the normal expression when talking about CD format or releases.

of, about, against, to or for racism? of, about, for, in or on friendship? of, about, for, on or to thing? of, about, for, to or with sex? of, about, on, to or for moon? "of access" or "with access"? "of accommodation" or "for accommodation"? "of accuracy" or "for accuracy"? "of action" or "in action"? "of actor", "with actor" or "by actor"? "of address" or "to address"? "of administration" or "in administration"?

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