04

Stephen F. Heffner

President, XTRAN, LLC
Casa Grande, AZ, USA
english

Software inventor / architect / designer / implementer, entrepreneur, educator, expert witness

Entered computer field in 1963 as IBM Customer Engineer. Systems analysis, design, and programming since 1964. Independent systems consultant since 1972; clients include large and small firms, governments, and universities, in N. America, Europe, Asia, Africa, and Australia.
Consulting activities include IT audits and corporate database design. Expert witness in legal cases involving computer software.
Systems programming activities include design and implementation of real-time systems, operating systems, database management systems, computer simulation systems, compilers and interpreters, computer networking, laboratory and industrial automation.
Founded Pennington Systems Incorporated in 1977 to develop and market systems software products and services. Pennington was superseded in 2013 by XTRAN, LLC. Designed, implemented, and documented many of XTRAN, LLC's software products, including XTRAN, an expert system for rule-driven symbolic manipulation of computer languages such as analysis, translation, and re-engineering of second through fourth generation computer languages, markup languages, scripting languages, and database languages.
Wharton Business School (University of Pennsylvania) faculty member for 13 years, from 1981 (Lecturer) to 1994 (Adjunct Associate Professor), in the Decision Sciences department. Taught many undergraduate and graduate courses at Wharton, including honors courses and advanced seminars in programming and software engineering, database design and implementation, and information systems. Originated and designed several courses.
Member, Association of Computing Machinery and IEEE Computer Section since 1975; Past Chairman of Princeton, New Jersey ACM chapter and of local Special Interest Group for Programming Languages (SIGPLAN).
Published magazine and journal articles in the professional media. Participant in international, national, and regional conferences, workshops, and seminars, including presentations in North America, Europe, Asia, and Africa.

icon_user_fb_hover



Assembler


3 follower

Automation


4 follower

Bash


3 follower

C


7 follower

C++


7 follower

COBOL


3 follower

Code Review


6 Contribution (last : Oct 10, 2013) 4 follower


Compilers


3 follower

Consultancy


11 follower

Database


6 follower

Database Design


5 follower


Documentation


5 follower

Engineering


13 follower

Enterprise Architecture


6 Contribution (last : May 1) 20 follower

Expert Witness


4 follower

Fortran


3 follower

IBM Assembler


3 follower

Integration


2 Contribution (last : Oct 3, 2013) 16 follower

Intellectual Property


6 Contribution (last : Oct 10, 2013) 17 follower

International Expertise


3 Contribution (last : Jan 29, 2014) 4 follower

IP Protection


6 Contribution (last : Oct 10, 2013) 4 follower

Java


3 Contribution (last : Sep 18, 2013) 14 follower


Linux


9 follower

Management Consulting


1 Contribution (last : May 31, 2013) 61 follower

Operating System


1 Contribution (last : Sep 25, 2012) 6 follower

Pascal


4 follower

PL/1


3 follower


Programming


6 follower

Re-engineering


3 follower

Real Time


2 follower


SDLC


6 follower

Simulation


4 follower


Software Design


5 follower

Software Development


6 Contribution (last : Oct 10, 2013) 16 follower


Software IP


6 Contribution (last : Oct 10, 2013) 4 follower


Solaris


4 follower

SQL


13 follower


System Migration


3 follower

Systems Analysis


4 follower

Technology


55 Contribution (last : Oct 11) 174 follower


Unix


5 follower

XML


3 Contribution (last : Jun 1, 2012) 10 follower

316 Contribution

63

Antoine Fournier

Consultant, ISIS Papyrus Europe ...

italian french english


01

Jan Vajda

Attorney at Law Namestovo, ...

russian french english



1 Contribution

01

Nils Talibart

Consultant SEO, NT Mé...

french spanish english


1 Contribution


Stephen F. XL score

04

Activity


0
Question

0
Idea

0
Debate

3
Answer