Invited lecture at ISCTE-IUL (Lisbon, Portugal) about the Executable Web. I try to draw a parallel between the calculator industry, spreadsheets and the Web.

1. photo: John Haslam
The Executable Bruno Pedro
May 2010
Web

2. Bruno Pedro
A n e x p e r i e n c e d We b d e v e l o p e r a n d
entrepreneur. Has extensive background in
large scale projects and technical writing.
http://tarpipe.com/user/bpedro

3. What is tarpipe?
User

4. What is tarpipe?

5. Problem: calculations

6. before 1978

7. before 1978

8. before 1978

9. before 1978
not mentioning non-electronic solutions!

10. 1978
Bob Frankston e Dan Bricklin

11. The idea
"Imagine if my calculator had a
ball in its back, like a mouse..."
http://www.bricklin.com/history/saiidea.htm

12. The idea
"Imagine if my calculator had a
ball in its back, like a mouse..."
“I could just move my mouse/keyboard
calculator around, punch in a few numbers,
circle them to get a sum, do some calculations”
http://www.bricklin.com/history/saiidea.htm

13. Visicalc
• Information is transported between cells
• Results are calculated without user
intervention

14. The spreadsheet

15. What happened?
• The calculator isn’t dead
• A new industry was created
• The spreadsheet application
became itself a component

16. Another problem
Information management
“Many of the discussions of the future at CERN end
with the question - ‘Yes, but how will we ever keep
track of such a large project?’” — Tim Berners-Lee
http://www.w3.org/History/1989/proposal.html

17. Solution: hypertext

18. Evolution
• Simple pages with internal links
• Links between different pages
• User input handling
• Complex applications
• Information dissemination

19. Execution
• Exchange of information between
applications
• Little user intervention
• Execution of composed tasks
• Added value!

20. Possibilities
Internet Map
http://tinyurl.com/6hqlhy

21. Technology
• OpenID
• OAuth
• microformats
• RSS
• Activity streams
• OpenSearch

22. • Single Sign On (SSO)
• The identifier is an URI
• No need to use a password
• http://openid.net/

23. OAuth
• Authorization between applications
• Power delegation
• No need to use a password
• http://oauth.org/

24. OpenSearch
• Search standard
• Results can be RSS
• http://www.opensearch.org/

25. Challenges
• Interoperability
• Credential management
• Trust and authorization management
• Reliability
• Quality of Service (QoS)

26. tarpipe streamlines your tarpipe is one of the most Today I had a chance to
updates to various social curious experiments in spend time experimenting
web sites, creating simple social media that I've with tarpipe and I have to
or complex workflows to seen lately. The service say that I am intrigued by
update several buckets in has the potential to be the concept and impressed
one fell swoop. the answer to the lament by the implementation.
I first talked about in The
Adam Pash looming crisis: Personal Jeff Barr
lifehacker syndication overload. Amazon.com
Rafe Needleman
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