I have been dealt with many different programming languages in different development environments. Below are listed only those areas in which I really count myself as an experienced.
Environments: Windows, NetBeans, MS VWD, Apache, Linux, cPanel, Git.
Focused on other (commercial) activities but retained connection with software development. Support and adaptation of the PPS production & sales accounting system developed before. E-commerce solutions (e-shopping, e-promotion, e-payment).
Environments: Windows Server, RDP, Visual FoxPro, MS FrontPage & VWD.
Switching from system programming to creation of user applications. Developing accounting systems based on the relational database model. Multi-user access in the LAN, connecting LAN's into WLAN through a data transmission. Integrating several applications to exchange data inside the company information system.
Environments: MS-DOS, Lantastic, Windows, Dial-up networking, MS FrontPage.
The low-level assembly programming was required for access to system facilities and make the most of the potential of technology at the time. My main areas were OS system support, hardware diagnostics and drivers, data transmission programming between mainframe and PC’s (adapting protocols like Kermit), LAN and WLAN management.
Languages: IBM/370 & Intel x80 Assembler, PL/I, Pascal, Basic, REXX.
Environments: VM/CMS, CICS, MS-DOS, CP/M.