Should I put on my CV papers (or "talks") that appeared in (peer-reviewed!) conferences that have no proceedings? Should I avoid duplicates if the same paper also appears in another conference (with proceedings)?

Should I make it clear that the conference has no proceedings, or just list it in the "Conferences" section?

[CS field].

EDIT: some conferences are peer-reviewed but have no proceedings. Call it workshops if you wish. You submit a paper, and a committee selects 30%-40 of the papers - each submission gets a slot in presenting the results during the conference/workshop, however no formal proceedings is issued.
(I'm surprised no one heard of such conferences; maybe I'm using the wrong terms; sorry for that)

Should I put on my CV papers (or "talks") that appeared in (peer-reviewed!) conferences that have no proceedings? Should I avoid duplicates if the same paper also appears in another conference (with proceedings)?

Should I make it clear that the conference has no proceedings, or just list it in the "Conferences" section? If it changes anything, my field is Computer Science.

EDIT: some conferences are peer-reviewed but have no proceedings. Call it workshops if you wish. You submit a paper, and a committee selects 30%-40 of the papers - each submission gets a slot in presenting the results during the conference/workshop, however no formal proceedings is issued.
(I'm surprised no one heard of such conferences; maybe I'm using the wrong terms; sorry for that)

Should I add to my CV papers that appeared in (peer-reviewed!) conferences that have no proceedings? Should I avoid duplicates if the same paper also appears in another conference (with proceedings)?

Should I make it clear that the conference has no proceedings, or just list it in the "Conferences" section?

[CS field].

Should I put on my CV papers (or "talks") that appeared in (peer-reviewed!) conferences that have no proceedings? Should I avoid duplicates if the same paper also appears in another conference (with proceedings)?

Should I make it clear that the conference has no proceedings, or just list it in the "Conferences" section?

[CS field].

EDIT: some conferences are peer-reviewed but have no proceedings. Call it workshops if you wish. You submit a paper, and a committee selects 30%-40 of the papers - each submission gets a slot in presenting the results during the conference/workshop, however no formal proceedings is issued.
(I'm surprised no one heard of such conferences; maybe I'm using the wrong terms; sorry for that)

A simple question: Should I add to my CV papers that appeared in (peer-reviewed!) conferences that have no proceedings? Should I avoid duplicates if the same paper also appears in another conference (with proceedings)?

[CS field].

Should I add to my CV papers that appeared in (peer-reviewed!) conferences that have no proceedings? Should I avoid duplicates if the same paper also appears in another conference (with proceedings)?

Should I make it clear that the conference has no proceedings, or just list it in the "Conferences" section?

[CS field].