Here are some programming files that can be found in the Mac Archives:
 
/mac/development/libraries/tcpobjoexample1.0.sit.hqx
  44      7/1/93    BinHex4.0,StuffIt3.07

   A library and example code to demonstrate the use of some Object
   Oriented TCP units. These units implement a relatively high
   level interface to MacTCP, and allow fairly easy writing of
   TCP applications in Pascal using event driven, object oriented
   programming.

/mac/development/source/chat1.10.sit.hqx
  51    12/12/92    BinHex4.0,StuffIt3.07

   THINK Pascal 4.0 source for Chat, a background-only app that lets
   Macs with MacTCP 1.1 serve as a very  primitive IRC (Internet
   Relay Chat).  Once Chat is running, multiple people can Telnet to
   a port on your Mac and have online discussions.

/mac/development/source/fingersource1.35.sit.hqx
 218      3/9/92    BinHex4.0,StuffIt1.5.1

   Think Pascal 4 source code for the Finger and Finger Daemon
   utilities.

/mac/development/source/lpdaemon3.32src.cpt.hqx
 135    4/10/93     BinHex4.0,Compact1.34

   THINK C source to /mac/util/print/lpdaemon3.32.cpt.hqx, a program
   to send files from Unix hosts through your Mac (which acts as a
   server), to be printed on LaserWriters on the Macintosh network.
   Also includes source to LPR 1.0.1, an lpDaemon client that submits
   jobs to a (UNIX) printer queue.

/mac/development/source/ncsatelnet2.5src.cpt.hqx
1085     7/22/92    BinHex4.0,Compact1.34

   MPW C source for NCSA Telnet.

/mac/development/source/newswatchersrc2.0d17.cpt.hqx
 360    11/19/93    BinHex4.0,Compact1.34

   Everything you need to build NewsWatcher (the source,
   project files, MacTCP includes) in THINK C.

/mac/development/source/nuntius1.1src.cpt.hqx
 561     8/16/92    BinHex4.0,Compact1.34

   MacApp 3 and C++ source for the Nuntius newsreader program.

/mac/development/source/pppsrc2.01.sit.hqx
 165    10/30/93    BinHex4.0,StuffIt1.5.1

   THINK C 5.0 source for MacPPP from Merit/MichNet.

/mac/development/source/rcpformpw.sit.hqx
  44     10/5/92    BinHex4.0,StuffIt1.5.1

   Example source code to demonstrate the implementation of the UNIX
   rcp program on the Mac.

/mac/development/source/tcpexample1.00.sit.hqx
  42    12/13/92    BinHex4.0,StuffIt3.07

   Sample code to demonstrate the use of a relatively high level
   interface to MacTCP that allows fairly easy writing of TCP
   applications in Pascal using event-driven programming.