We think this one's self-explanatory...

        ==================
        High School/Jr.High
        ==================

        10 PRINT "HELLO WORLD"
        20 END

        ====================
        First year in College
        ====================

        program Hello(input, output)
        begin
        writeln('Hello World');
        end.

        =====================
        Senior year in College
        =====================

        (defun hello
        (print
        (cons 'Hello (list 'World))))

        ===============
        New professional
        ===============

        #include
        void main(void)
        {
        char *message[] = {"Hello ", "World"};
        int i;

        for(i = 0; i < 2; ++i)
        printf("%s", message[i]);
        printf("\n");
        }

        ===================
        Seasoned professional
        ====================

        #include
        #include

        class string
        {
        private:
        int size;
        char *ptr;

        public:
        string() : size(0), ptr(new char('\0')) {}

        string(const string &s) : size(s.size)
        {
        ptr = new char[size + 1];
        strcpy(ptr, s.ptr);
        }

        ~string()
        {
        delete [] ptr;
        }

        friend ostream &operator <<(ostream &, const string &);
        string &operator=(const char *);
        };

        ostream &operator<<(ostream &stream, const string &s)
        {
        return(stream << s.ptr);
        }

        string &string::operator=(const char *chrs)
        {
        if (this != &chrs)
        {
        delete [] ptr;
        size = strlen(chrs);
        ptr = new char[size + 1];
        strcpy(ptr, chrs);
        }
        return(*this);
        }

        int main()
        {
        string str;

        str = "Hello World";
        cout << str << endl;

        return(0);
        }

        ================
        Master Programmer
        ================

        [
        uuid(2573F8F4-CFEE-101A-9A9F-00AA00342820)
        ]
        library LHello
        {
        // bring in the master library
        importlib("actimp.tlb");
        importlib("actexp.tlb");

        // bring in my interfaces
        #include "pshlo.idl"

        [
        uuid(2573F8F5-CFEE-101A-9A9F-00AA00342820)
        ]
        cotype THello
        {
        interface IHello;
        interface IPersistFile;
        };
        };

        [
        exe,
        uuid(2573F890-CFEE-101A-9A9F-00AA00342820)
        ]
        module CHelloLib
        {

        // some code related header files
        importheader();
        importheader();
        importheader();
        importheader("pshlo.h");
        importheader("shlo.hxx");
        importheader("mycls.hxx");

        // needed typelibs
        importlib("actimp.tlb");
        importlib("actexp.tlb");
        importlib("thlo.tlb");

        [
        uuid(2573F891-CFEE-101A-9A9F-00AA00342820),
        aggregatable
        ]
        coclass CHello
        {
        cotype THello;
        };
        };

        #include "ipfix.hxx"
        extern HANDLE hEvent;
        class CHello : public CHelloBase
        {
        public:
        IPFIX(CLSID_CHello);

        CHello(IUnknown *pUnk);
        ~CHello();

        HRESULT __stdcall PrintSz(LPWSTR pwszString);

        private:
        static int cObjRef;
        };

        #include
        #include
        #include
        #include
        #include "thlo.h"
        #include "pshlo.h"
        #include "shlo.hxx"
        #include "mycls.hxx"

        int CHello:cObjRef = 0;

        CHello::CHello(IUnknown *pUnk) : CHelloBase(pUnk)
        {
        cObjRef++;
        return;
        }

        HRESULT __stdcall CHello::PrintSz(LPWSTR pwszString)
        {
        printf("%ws\n", pwszString);
        return(ResultFromScode(S_OK));
        }

        CHello::~CHello(void)
        {

        // when the object count goes to zero, stop the server .
        cObjRef--;
        if( cObjRef == 0 )
        PulseEvent(hEvent);

        return;
        }

        #include
        #include
        #include "pshlo.h"
        #include "shlo.hxx"
        #include "mycls.hxx"

        HANDLE hEvent;

        int _cdecl main(
        int argc,
        char * argv[]
        ) {
        ULONG ulRef;
        DWORD dwRegistration;
        CHelloCF *pCF = new CHelloCF();

        hEvent = CreateEvent(NULL, FALSE, FALSE, NULL);

        // Initialize the OLE libraries
        CoInitiali, NULL);

        // Initialize the OLE libraries
        CoInitializeEx(NULL, COINIT_MULTITHREADED);

        CoRegisterClassObject(CLSID_CHello, pCF, CLSCTX_LOCAL_SERVER,
        REGCLS_MULTIPLEUSE, &dwRegistration);

        // wait on an event to stop
        WaitForSingleObject(hEvent, INFINITE);

        // revoke and release the class object
        CoRevokeClassObject(dwRegistration);
        ulRef = pCF-Release();

        // Tell OLE we are going away.
        CoUninitialize();

        return(0); }

        extern CLSID CLSID_CHello;
        extern UUID LIBID_CHelloLib;

        CLSID CLSID_CHello = { /* 2573F891-CFEE-101A-9A9F-00AA00342820
        */
        0x2573F891,
        0xCFEE,
        0x101A,
        { 0x9A, 0x9F, 0x00, 0xAA, 0x00, 0x34, 0x28, 0x20 }
        };

        UUID LIBID_CHelloLib = { /*
        2573F890-CFEE-101A-9A9F-00AA00342820
        */
        0x2573F890,
        0xCFEE,
        0x101A,
        { 0x9A, 0x9F, 0x00, 0xAA, 0x00, 0x34, 0x28, 0x20 }
        };

        #include
        #include
        #include
        #include
        #include
        #include "pshlo.h"
        #include "shlo.hxx"
        #include "clsid.h"

        int _cdecl main(
        int argc,
        char * argv[]
        ) {
        HRESULT hRslt;
        IHello *pHello;
        ULONG ulCnt;
        IMoniker * pmk;
        WCHAR wcsT[_MAX_PATH];
        WCHAR wcsPath[2 * _MAX_PATH];

        // get object path
        wcsPath[0] = '\0';
        wcsT[0] = '\0';
        if( argc 1) {
        mbstowcs(wcsPath, argv[1], strlen(argv[1]) + 1);
        wcsupr(wcsPath);
        }
        else {
        fprintf(stderr, "Object path must be specified\n");
        return(1);
        }

        // get print string
        if(argc 2)
        mbstowcs(wcsT, argv[2], strlen(argv[2]) + 1);
        else
        wcscpy(wcsT, L"Hello World");

        printf("Linking to object %ws\n", wcsPath);
        printf("Text String %ws\n", wcsT);

        // Initialize the OLE libraries
        hRslt = CoInitializeEx(NULL, COINIT_MULTITHREADED);

        if(SUCCEEDED(hRslt)) {

        hRslt = CreateFileMoniker(wcsPath, &pmk);
        if(SUCCEEDED(hRslt))
        hRslt = BindMoniker(pmk, 0, IID_IHello, (void **)&pHello);

        if(SUCCEEDED(hRslt)) {

        // print a string out
        pHello-PrintSz(wcsT);

        Sleep(2000);
        ulCnt = pHello-Release();
        }
        else
        printf("Failure to connect, status: %lx", hRslt);

        // Tell OLE we are going away.
        CoUninitialize();
        }

        return(0);
        }

        ================
        Apprentice Hacker
        ================

        #!/usr/local/bin/perl
        $msg="Hello, world.\n";
        if ($#ARGV = 0) {
        while(defined($arg=shift(@ARGV))) {
        $outfilename = $arg;
        open(FILE, "" . $outfilename) || die "Can't write $arg:
        $!\n";
        print (FILE $msg);
        close(FILE) || die "Can't close $arg: $!\n";
        }
        } else {
        print ($msg);
        }
        1;

        =================
        Experienced Hacker
        =================

        #include
        #define S "Hello, World\n"
        main(){exit(printf(S) == strlen(S) ? 0 : 1);}

        ==============
        Seasoned Hacker
        ==============

        % cc -o a.out ~/src/misc/hw/hw.c
        % a.out

        ==========
        Guru Hacker
        ==========

        % cat
        Hello, world.
        ^D

        ====================
        AXE System programmer
        ====================

        LL0:
        .seg "data"
        .seg "text"
        .proc 04
        .global _main
        _main:
        !#PROLOGUE# 0
        sethi %hi(LF26),%g1
        add %g1,%lo(LF26),%g1
        save %sp,%g1,%sp
        !#PROLOGUE# 1
        .seg "data1"
        L30:
        .ascii "Hello, World\012\0"
        .seg "text"
        .seg "data1"
        L32:
        .ascii "Hello, World\012\0"
        .seg "text"
        set L32,%o0
        call _strlen,1
        nop
        mov %o0,%i5
        set L30,%o0
        call _printf,1
        nop
        cmp %o0,%i5
        bne L2000000
        nop
        mov 0,%o0
        b L2000001
        nop
        L2000000:
        mov 0x1,%o0
        L2000001:
        call _exit,1
        nop
        LE26:
        ret
        restore
        LF26 = -96
        LP26 = 96
        LST26 = 96
        LT26 = 96
        .seg "data"

        0000000 0103 0107 0000 0060 0000 0020 0000 0000
        0000020 0000 0030 0000 0000 0000 0054 0000 0000
        0000040 033f ffff 8200 63a0 9de3 8001 1100 0000
        0000060 9012 2000 4000 0000 0100 0000 ba10 0008
        0000100 1100 0000 9012 2000 4000 0000 0100 00 ba10 0008
        0000100 1100 0000 9012 2000 4000 0000 0100 0000
        0000120 80a2 001d 1280 0005 0100 0000 9010 2000
        0000140 1080 0003 0100 0000 9010 2001 4000 0000
        0000160 0100 0000 81c7 e008 81e8 0000 0000 0000
        0000200 4865 6c6c 6f2c 2057 6f72 6c64 0a00 4865
        0000220 6c6c 6f2c 2057 6f72 6c64 0a00 0000 0000
        0000240 0000 000c 0000 0608 0000 006e 0000 0010
        0000260 0000 060b 0000 006e 0000 0014 0000 0286
        0000300 ffff ffec 0000 0020 0000 0608 0000 0060
        0000320 0000 0024 0000 060b 0000 0060 0000 0028
        0000340 0000 0186 ffff ffd8 0000 004c 0000 0386
        0000360 ffff ffb4 0000 0004 0500 0000 0000 0000
        0000400 0000 000a 0100 0000 0000 0000 0000 0012
        0000420 0100 0000 0000 0000 0000 001a 0100 0000
        0000440 0000 0000 0000 0020 5f6d 6169 6e00 5f70
        0000460 7269 6e74 6600 5f73 7472 6c65 6e00 5f65
        0000500 7869 7400
        0000504

        % axe_generate -f system.uhdl
        Application 'Exchange' generated
        2324042350000000 source code lines
        No Errors detected.
        Hardware retrieval...done OK
        Certification Test...done OK
        Packing..............done OK
        Delivery.............done OK
        Application 'Exchange' delivered to customer
        23456000 bytes/sec.
        End processing, 2345 seconds.

        ==========================
        Ultra high level programmer
        ==========================

        system.uhdl :

        SYSTEM
        CREATE ScreenWin
        SIZE 20000000/Unit=One
        DESTINATION Order.dest[One]
        OUTPUT CHARACTER['Hello world']
        END
        END

        ==========
        New Manager
        ==========

        10 PRINT "HELLO WORLD"
        20 END

        =============
        Middle Manager
        =============

        mail -s "Hello, world." bob@b12 <<mailto:bob@b12 
        <<mailto:bob@b12> > >     <<mailto:bob@b12>
        > >
        Bob, could you please write me a program that prints
        "Hello, world."? I need it by tomorrow.

        ^D

        =============
        Senior Manager
        =============

        % zmail all

        I need a "Hello, world." program by this afternoon.
 
        ==============
        Chief Executive
        ==============

        % message
        message: Command not found
        % pm
        pm: Command not found
        % letter
        letter: Command not found.
        % mail
        To: ^X ^F ^C
        help mail
        help: Command not found.
        what
        what: Command not found
        need help
        need: Command not found
        damn!
        !: Event unrecognized
        exit
        exit: Unknown
        quit
        %
        % logout