Turbo C++ 3.0 was released in 1991 (shipping on November 20), and came in amidst expectations of the coming release of Turbo C++ for Microsoft Windows.
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The program has existed in several incarnations: text-based curses for SunOS, text-based hardcoded VT52 for Atari TOS, GEM-based for Atari, Turbo C for DOS, Xlib-based for Linux and now Xt-based for POSIX-compliant systems.