The document reflects on the programming landscape as of 2000, noting a shift in the prevalence of older programming languages like COBOL and PL/I, while also recognizing the emergence of specialized languages such as Perl and Python. It highlights concerns about the costs and inefficiencies of modifying legacy systems, while concluding that Enterprise Java and open source technologies are on the rise. The document stresses the need for investment in education and interoperability among programming tools.

1. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.
Mark Cathcart
Java programming for
the Mainframe - Not just
technology

2. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.

3. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.
Programming Landscape
Year 2000
Older programmers go (back?) into retirement
Non-Web programs vs. Web programs
More than 1000x more Non-Web programs (ok, I made this up!)
Business languages
COBOL, PL/I etc. still pervasive
C/C++
Never quite made it... (as business languages)
Probably more lines of C than any other language
It's all in operating systems, tools(compilers, make etc.) and
technology (TCP/IP etc.)
Specialized languages on the increase
Pearl, Python, Rexx(NetRexx) (it appears)

4. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.
Programming Landscape(2)
What about Assembler/Machine code ?
Still in use...
Airlines, Banks, etc.
High volume transaction systems
but getting unacceptably expensive (to modify, maintain etc.)
Increase in processor speeds continues
More than ever we can afford machine inefficient languages
Cost is "man" versus machine
We are in the home straight...
Enterprise Java is here!
Open Source is coming...
C# is late, offers little new and will lack a pervasive, open runtime

5. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.

6. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.

7. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.

8. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.
What can we do ?
Invest in people
Encourage
Educate
Integrate tools/compilers
Provide Language Interoperability
You tell me!

9. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.
Here is one we
wrote earlier!
Any other ideas?
Do you have
anything to
offer?

10. © 1999 – Prepared by Mark Cathcart for the IBM Academy of Technology Annual General Meeting, 2000.
Mark Cathcart has left the building!
Gone to teach 2x Java for OS/390
Programming Workshops at the
IBM OS/390 Expo in Washington DC.
PLEASE GET IN TOUCH VIA Lotus Notes
mark cathcart/uk/ibm@ibmgb