3. H 26/9 inleiding, toledo, maple
Z 27/9 internet en wwww
H 3/10 systemen, gebruikers, web, virussen
Z 10/10 tekstverwerking en rekenblad
Z 17/10 samenwerking
H+Z 24/10 presentaties en rapportering, maple
3
4. week les zelfst oef
1 woe x
2 woe ma-vr
3 x ma-vr
4 x ma-vr
5 woe pten!
6 x
7 ma-vr
8 pten!
8. Moore’s law
• ‘the number of transistors that can be placed
inexpensively on an integrated circuit has doubled
approximately every two years’ (1965)
• ook
• processing speed
• memory capacity
• sensors
• network capacity
• ... 8
9. what does “exponential” mean?
if you fold a sheet of paper 50 times,
then how thick is the result?
about the distance to the sun...
9
11. wiring the ENIAC with a new program
ENIAC
1946
Mauchly and Eckert
stats:
3,000 cubic feet
30 tons
18,000 vacuum tubes
70,000 resistors
170 kilowatt power req.
~1 kilobit memory
approximate processing power of today’s
singing birthday card
but not a stored-program device
Great description here: www.computinghistorymuseum.org/teaching/lectures/pptlectures/7b-eniac.ppt
12. preparing punch cards
An important by-product:
confetti. All the chaff from all
those cards was just great to
throw around the dorm.
13. preparing punch cards
Each key press punches holes,
so there’s no “erase.” Fixing a
mistake almost always required
ejecting the card and starting it
over.
In a pinch – say you really
needed to fix a card and the
punch was down – a clever
operator might know enough
about the card encoding to
close some holes with tape and
open others with a knife.
So on the one hand, we were
adapting to the machines. On
the other hand, the workings of
the machines were exposed,
right out where we could get to
them.
20. D. Engelbart, Augment
• Stanford Research Institute
• “Uitvinder” van muis,
windows, groupware, ...
• team naar Xerox PARC
• nu: bootstrap institute
• http://www.bootstrap.org/
20
25. All 39 pages of advertising that Apple bought in a 1984 issue of newsweek are available here: http://www.aci.com.pl/mwichary/computerhistory/ads/
macnewsweek
