PL/I

PL/I（），源自編程語言一号（）的縮寫，一種过程式、指令式程式語言。由IBM公司在1960年代发明的第三代高级编程语言，用于IBM的、或迪吉多的VAX/VMS等操作系统中。
在系统软件，图像，仿真，文字处理，网络，商业软件等领域均可应用。

样例代码

Hello world程序
Hello2: proc options(main);
    put list ('Hello, world!');
end Hello2;

查找字符串
/* Read in a line, which contains a string,
/* and then print every subsequent line that contains that string. */

find_strings: procedure options (main);
    declare pattern character (100) varying;
    declare line character (100) varying;
    declare line_no fixed binary;

    on endfile (sysin) stop;

    get edit (pattern) (L);
    line_no = 1;
    do forever;
        get edit (line) (L);
        if index(line, pattern) > 0 then
            put skip list (line_no, line);
        line_no = line_no + 1;
    end;

end find_strings;

引用

外部連結 

 Kednos PL/I for HP OpenVMS VAX and Alpha  
 IBM PL/I for IBM大型主機， and Windows
 PL/I Resources
 PL/I home
 PL/I newsletter April 2006
 Power vs. Adventure - PL/I and C A side-by-side comparison of PL/I and C。
 PL/I for GCC The pl1gcc project is an attempt to create a native PL/I compiler using the GNU Compiler Collection.
 Languages Related to PL/I
 Kednos PL/I for OpenVMS Compiler Documentation
 PL/I grammar

程序设计语言