Click above to get retro games delivered to your door ever month!

 abort()          Abort Process and Return Error
 abs()            Calculate Absolute Value of Integer
 absread()        Read Disk Sectors
 abswrite()       Write Disk Sectors
 access()         Check File Permission Setting
 acos()           Calculate Arc Cosine
 alloca()         Allocate Memory Block on Stack
 allocmem()       Allocate DOS Memory Segment
 asctime()        Convert Time from Structure to String
 asin()           Calculate Arc Sine
 assert()         Diagnostic Message Generator
 atan()           Calculate Arc Tangent
 atan2()          Calculate Arc Tangent of y/x
 atexit()         Register Exit Function
 atof()           Convert String to Double
 atoi()           Convert String to Integer
 atol()           Convert String to Long
 bdos()           Invoke DOS Function, Short Form
 bdosptr()        MS-DOS System Call
 bioscom()        Communications I/O
 biosdisk()       Hard Disk / Floppy I/O
 biosequip()      Check Equipment
 bioskey()        Keyboard Interface
 biosmemory()     Return Memory Size
 biosprint()      Printer I/O
 biostime()       Return the Time of Day
 brk()            Change Data-Segment Space Allocation
 bsearch()        Perform Binary Search
 cabs()           Calculate Absolute Value of Complex Number
 calloc()         Allocate and Zero Memory
 ceil()           Calculate Ceiling of Value
 cgets()          Get a Character String from the Console
 chdir()          Change Current Working Directory
 chmod()          Change File Permission Setting
 _chmod()         Change Access Mode of File
 _clear87()       Get and Clear 8087/80287 Status Word
 clearerr()       Clear Error Indicator for a Stream
 close()          Close File
 _close()         Close a File Handle
 coreleft()       Return a Measure of Unused Memory
 cos()            Calculate Cosine
 cosh()           Calculate Hyperbolic Cosine
 country()        Return Country-Dependent Information
 cprintf()        Formatted Write to Console
 cputs()          Write a String to the Console
 creat()          Create a New File
 _creat()         Create a New File
 creatnew()       Create a New File
 creattemp()      Create a New File or Rewrite an Existing One
 cscanf()         Read Formatted Data from Console
 ctime()          Convert Time from Long Integer to String
 ctrlbrk()        Set Control-Break Handler
 difftime()       Find the Difference between Two Times
 disable()        Disable Interrupts
 dosexterr()      Get DOS Extended Error Values
 dostounix()      Convert Date and Time to UNIX Time Format
 dup()            Create Second Handle for Open File
 dup2()           Reassign a File Handle
 ecvt()           Convert Double to String
 enable()         Enable Interrupts
 eof()            Test for End of File
 exec...()        An Overview of the Eight Exec Functions
 execl()          Execute Program Using: Arg List
 execle()         Execute Program Using: Arg List, Environment
 execlp()         Execute Program Using: Arg List, PATH
 execlpe()        Execute Program Using: Arg List, PATH, Environment
 execv()          Execute Program Using: Arg Array
 execve()         Execute Program Using: Arg Array, Environment
 execvp()         Execute Program Using: Arg Array, PATH
 execvpe()        Execute Program Using: Arg Array, PATH, Environment
 exit()           Terminate Process after Cleanup
 _exit()          Terminate Process without Cleanup
 exp()            Calculate Exponential
 fabs()           Calculate Absolute Value of Floating-Point
 farcalloc()      Allocate Memory from Far Heap
 farcoreleft()    Return Measure of Unused Memory in Far Heap
 farfree()        Free a Block from Far Heap
 farmalloc()      Allocate Memory from Far Heap
 farrealloc()     Adjust Allocated Block in Far Heap
 fclose()         Close a Stream
 fcloseall()      Close All Open Streams
 fcvt()           Convert Double to String
 fdopen()         Open a Stream Using a Handle
 feof()           Detect Stream End-of-File (Macro)
 ferror()         Test for Error on a Stream (Macro)
 fflush()         Flush a Stream
 fgetc()          Read a Character from a Stream
 fgetchar()       Read a Character from Stdin
 fgets()          Read a String from Stream
 filelength()     Return File Length
 fileno()         Get File Handle Associated with Stream (Macro)
 findfirst()      Search Disk Directory
 findnext()       Fetch Files That Match findfirst()
 floor()          Calculate Floor of Value
 flushall()       Flush All Streams and Clear All Buffers
 fmod()           Calculate Floating-Point Remainder
 fnmerge()        Make New File Name
 fnsplit()        Split a Full Path Name into Its Components
 fopen()          Open a File
 FP_OFF()         Get or Set Offset Portion of a Far Pointer (Macro)
 FP_SEG()         Get or Set Segment Portion of a Far Pointer (Macro)
 _fpreset()       Reinitialize Floating-Point Math Package
 fprintf()        Write Formatted Data to Stream
 fputc()          Write a Character to a Stream
 fputs()          Write a String to Stream
 fread()          Read Unformatted Data from Stream
 free()           Deallocate Memory Block
 freemem()        Free a Previously Allocated DOS Memory Block
 freopen()        Reassign a File Pointer
 frexp()          Get Mantissa and Exponent of Floating-Point Value
 fscanf()         Read Formatted Data from Screen
 fseek()          Reposition File Pointer to Given Location
 fstat()          Get Information about Open File
 ftell()          Get Current File Pointer Position
 fwrite()         Write Unformatted Data to Stream
 gcvt()           Convert Double to String
 geninterrupt()   Generate Software Interrupt
 getc()           Read a Character from a Stream (Macro)
 getchar()        Read a Character from 'Stdin'
 getch()          Get a Character from the Console without Echo
 getche()         Get a Character from Console with Echo
 getcwd()         Get Path Name of Current Working Directory
 getenv()         Get a Value from the Environment Table
 getpid()         Get Process ID
 getcbrk()        Get Control-Break Setting
 getcurdir()      Get Current Directory
 getdate()        Get Date
 getdfree()       Get Disk Free Space
 getdisk()        Get Current Drive
 getdta()         Get Disk Transfer Address
 getfat()         Get File Allocation Table Information
 getfatd()        Get File Allocation Table Information
 getftime()       Get File Date and Time
 getpass()        Read a Password
 getpsp()         Get the Program Segment Prefix
 gets()           Read a Line from 'Stdin'
 gettime()        Get System Time
 getvect()        Get Interrupt Vector Entry
 getverify()      Get Verify State
 getw()           Read an Integer from a Stream
 gmtime()         Convert Time from Long Integer to Structure
 gsignal()        Software Signals
 harderr()        Establish a Hardware Error Handler
 hardresume()     Hardware Error Handler Function
 hardretn()       Hardware Error Handler Function
 hypot()          Calculate the Hypotenuse of a Right Triangle
 inport()         Input from Hardware Port
 inportb()        Input from Hardware Port
 intr()           Alternate 8086 Software Interrupt Interface
 int86()          Execute 8086 Software Interrupt
 int86x()         Set Segment Registers and Execute Software Interrupt
 intdos()         Invoke DOS Function, Long Form
 intdosx()        Set Seg Regs and Invoke DOS Function, Long Form
 ioctl()          Control I/O Device
 isalnum()        Test for Alphanumeric Character (Macro)
 isalpha()        Test for Alphabetic Character (Macro)
 isascii()        Test for ASCII Character (Macro)
 isatty()         Check for Character Device
 iscntrl()        Test for Control Character
 isdigit()        Test for Digit
 isgraph()        Test for Printable Character Except Space
 islower()        Test for Lowercase
 isprint()        Test for Printable Character
 ispunct()        Test for Punctuation Character
 isspace()        Test for White-Space Character
 isupper()        Test for Uppercase
 isxdigit()       Test for Hexadecimal Digit
 itoa()           Convert Integer to String
 kbhit()          Check Keyboard Input Buffer for Character Waiting
 keep()           Exit and Remain Resident
 labs()           Calculate Absolute Value of Long Integer
 ldexp()          Convert Mantissa and Exponent to Floating Point
 lfind()          Linear Search for Key
 localtime()      Convert Time from Int to Structure--Local Correction
 lock()           Set File Sharing Locks
 log()            Calculate Natural Logarithm
 log10()          Calculate Base 10 Logarithm
 longjmp()        Restore Program State
 lsearch()        Linear Search for Key; Add Key If Not Found
 lseek()          Reposition File Pointer to Specified Location
 ltoa()           Convert Long to String
 malloc()         Allocate Memory Block
 matherr()        Handle Math Error
 _matherr()       Floating-Point Error Handling Routine
 memccpy()        Copy Characters from Buffer
 memchr()         Find Character in Buffer
 memcmp()         Compare Characters from Two Buffers
 memcpy()         Copy Characters between Buffers
 memicmp()        Compare Characters in Two Buffers
 memmove()        Move a Block of Bytes
 memset()         Initialize Buffer
 mkdir()          Create a New Directory
 MK_FP()          Make a Far Pointer
 mktemp()         Create a Unique File Name
 modf()           Split Floating Point into Mantissa and Exponent
 movedata()       Copy Characters to a Different Segment
 movmem()         Move a Block of Bytes
 open()           Open a File
 _open()          Open a File For Reading or Writing
 outport()        Output to a Hardware Port
 outportb()       Output to a Hardware Port
 parsfnm()        Parse File Name
 peek()           Examine Memory Location
 peekb()          Examine Memory Location
 perror()         Print Error Message
 poke()           Store Value at a Given Memory Location
 pokeb()          Store Value at a Given Memory Location
 poly()           Generate a Polynomial from Arguments
 pow()            Calculate X Raised to the Yth Power
 pow10()          Power Function
 printf()         Write Formatted String to Stdout
 putc()           Write a Character to Stream
 putchar()        Write a Character to Stdout
 putch()          Write a Character to the Console
 putenv()         Create New Environment Variables
 puts()           Write String to Stdout
 putw()           Write an Integer to Stream
 qsort()          Perform Quick Sort
 rand()           Get Pseudorandom Integer
 randbrd()        Random Block Read
 randbwr()        Random Block Write
 read()           Read Data from File
 _read()          Read Data from a File
 realloc()        Reallocate Memory Block
 rename()         Rename a File or Directory
 rewind()         Reposition File Pointer to Beginning of Stream
 rmdir()          Remove a Directory
 sbrk()           Reset Break Value for Calling Process
 scanf()          Read Formatted Data from Stdin
 searchpath()     Search the DOS Path
 segread()        Return Current Values of Segment Registers
 setblock()       Modify Size of DOS Memory Segment
 setbuf()         Control Stream Buffering
 setcbrk()        Set Control-Break Setting
 setdate()        Set MS-DOS Date
 setdisk()        Set Current Disk Drive
 setdta()         Set Disk Transfer Address
 setftime()       Set File Date and Time
 setjmp()         Save Program State
 setmem()         Assign a Value to Memory
 setmode()        Set File-Translation Mode
 settime()        Set System Time
 setvbuf()        Control Stream Buffering and Buffer Size
 setvect()        Set Interrupt Vector Entry
 setverify()      Set Verify State
 sin()            Calculate Sine
 sinh()           Calculate Hyperbolic Sine
 sleep()          Suspend Execution for Interval
 spawn...()       An Overview of the Eight Spawn Functions
 spawnl()         Execute Program Using: Arg List
 spawnle()        Execute Program Using: Arg List, Environment
 spawnlp()        Execute Program Using Arg List, PATH
 spawnlpe()       Execute Program Using Arg List, PATH, Environment
 spawnv()         Execute Program Using Arg Array
 spawnve()        Execute Program Using Arg Array, Environment
 spawnvp()        Execute Program Using Arg Array, PATH
 spawnvpe()       Execute Program Using Arg Array, PATH, Environment
 sprintf()        Write Formatted Data to String
 sqrt()           Calculate Square Root
 srand()          Set Random Starting Point
 sscanf()         Read Formatted Data from String
 ssignal()        Implement Software Signals
 stackavail()     Return Size of Available Stack Memory
 stat()           Get File-Status Information on Named File
 _status87()      Get 8087/80287 Floating-Point Status Word
 stime()          Set Time
 strcat()         Append a String
 strchr()         Find a Character in a String
 strcmp()         Compare Two Strings, Case Sensitive
 strcmpi()        Compare Two Strings, Case Insensitive
 stricmp()        Compare Two Strings, Case Insensitive
 strcpy()         Copy One String to Another
 strcspn()        Scan One String for Another
 strdup()         Duplicate String
 strerror()       Save System Error Message
 strlen()         Get String Length
 strlwr()         Convert String to Lower Case
 strncat()        Append Specified Number of Characters to a String
 strncmp()        Compare n Characters of Two Strings, Case Sensitive
 strnicmp()       Compare n Characters of Strings, Case Insensitive
 strncpy()        Copy a Specified Number of Characters
 strnset()        Initialize n Characters of String
 strpbrk()        Scan String for Character from Character Set
 strrchr()        Scan String for Last Occurrence of Character
 strrev()         Reverse Characters in String
 strset()         Set All Characters in String
 strspn()         Find First Substring
 strstr()         Find Substring
 strtod()         Convert String to Double
 strtol()         Convert String to Long Decimal Integer
 strtok()         Finds Next Token in String
 strupr()         Convert String to Uppercase
 swab()           Swap Bytes
 system()         Execute DOS Command
 tan()            Calculate Tangent
 tanh()           Calculate Hyperbolic Tangent
 tell()           Get Current File Pointer Position
 time()           Get Current System Time as Long Integer
 toascii()        Convert 'c' to ASCII Character
 tolower()        Convert 'c' To Lowercase, If Appropriate
 _tolower()       Convert 'c' to Lowercase
 toupper()        Convert 'c' to Uppercase, If Appropriate
 _toupper()       Convert 'c' to Uppercase
 tzset()          Set External Time Variables, Environment Variables
 ultoa()          Convert Unsigned Long to String
 ungetc()         Push Character Back onto the Stream
 ungetch()        Push Back the Last Character Read from the Console
 unixtodos()      Convert Date and Time to DOS Format
 unlink()         Delete a File
 unlock()         Release File-Sharing Locks
 va_arg()         Access Variable Number of Arguments, ANSI C Style
 vfprintf()       Write Formatted Data to Stream
 vfscanf()        Perform Formatted Input from a Stream
 vprintf()        Write Formatted Data to Stdout
 vscanf()         Perform Formatted Input from Stdin
 vsprintf()       Write Formatted Data to String
 vsscanf()        Perform Formatted Input from String
 write()          Write Data to a File
 _write()         Write Data to a File