tl;dr: Turbo Pascal 7 was a landmark Windows development tool in the early 90s, offering an integrated IDE with source-level debugging, graphical UI design, and the Object Windows Library wrapper—making Windows programming dramatically easier than Microsoft's C toolchain. Its tightly optimized compiler, inherited from CP/M-era constraints, ran blazingly fast on contemporary hardware. It eventually lost ground to Microsoft's improving C tools, Visual Basic, and the entrenched preference for C among established software companies migrating to PCs.