[Avodah] Koseiv on computers

[Zev Sero]

On 27/12/2010 1:01 PM, Micha Berger wrote:

> 2- My real question is about e-paper, the kind of LCD used in the Kindle,
> Nook, and other (B&W) readers, as opposed to the back-lit screen of a
> cell phone, ipad, or laptop. The fact that it's passive, just something
> that changes color rather than emits light, is a tzad leheter on the
> electricity side. But e-paper only uses electricity when you change
> pages. Meaning, if you display an image and leave the e-reader alone,
> the text will stay on screen indefinitely.
>
> It is thus un-like the question of sheimos on a regular computer display.

Yes, it's more like writing on an etch-a-sketch, or one of those things
where you write on a film, and then pull the film and the writing
disappears.  That is to say, it's *intended* to be temporary, but there's
nothing in its actual nature to make it so.

WRT to knots, we take into account the tier's intention; if he intends
to undo the knot within 24 hours we don't call it "shel kayama" even if
it could last for a long time.  But I see no clear reason why that should
apply to writing.

In any event, temporary writing is assur mid'rabanan.

-- 
Zev Sero                      The trouble with socialism is that you
zev at sero.name                 eventually run out of other people’s money
                                                      - Margaret Thatcher