The maintenance administration division of an organizational  maintenance  department  maintains  a master paper or electronic message board of current messages with annotations of the action that was taken. A  computer  has  three  components—an  input device (keyboard, mouse), an output device (printer, monitor),  and  a  central  processing  unit  (CPU). Word-processing   computer   software   uses   a wraparound feature instead of the automatic return of an electric typewriter. The Department of the Navy (DON) Information SECNAV  Security  Program  (ISP)  Regulation, SECNAVINST   5510.36,   governs   the   handling, storage, and transmission of classified material. There are  three  classifications  of  classified  material—Top Secret, Secret, and Confidential. The commanding officer  is  responsible  for  safeguarding  classified material in his or her command. The U.S. Postal Service should not be used to transmit Top Secret material; Top-Secret material should be transmitted by cleared military personnel, DOD contractors, Defense Courier Service (DCS), or encrypted for electronic transmission. Secret matter may be transmitted by Registered  Mail  of  the  U.S.  Postal  Service. Confidential matter may be transmitted by First Class Mail of the U.S. Postal Service as long as the mail does not pass out of U.S. control. Secret and Confidential material may be transmitted by the methods that are authorized for Top-Secret material. The Department of the Navy Correspondence Manual,  SECNAVINST  5216.5,  gives  procedures  for preparing   standard   letters,   memorandums,   and endorsements.  The  standard  letter  requires  l-inch margins on all sides. The identification symbol of a standard  letter  identifies  the  sender,  acts  as  a  reference, and is used for filing purposes. The endorsement is similar to a standard letter, is transmitted through another  addressee  before  it  reaches  its  final  destination, and  is  used  to  approve,  disapprove,  forward,  or comment on the contents of another document. The memorandum is an informal means to communicate within an activity or between Navy activities. A naval message is urgent correspondence that is transmitted through a Navy telecommunication center. Minim ize is a release restriction to restrict the release of the least urgent messages during an actual or simulated emergency condition. When the NARR set from the Message Text Format (MTF) Editor is used, a naval message  must  have  two  or  more  references.  The Distributed   Plain   Language   Address   (PLA) Verification System (DPVS), which is used with the MTF  Editor,  gives  originators  of  naval  messages  access to plain language address information. The  directive  issuance  system  provides  naval activities with a uniform method of issuing directives. Directives are used to establish policy, organization, conduct, methods, or procedure. The two types of directives that are used in the directives issuance system are instructions and notices. A directive with a “C”  before  a  directive  number  indicates  that  the directive is classified Confidential. A directive with an "S" before a directive number indicates the directive is classified Secret. A directive without a letter before the directive number is an unclassified directive. A facsimile machine or fax is an alternative to U.S. Postal Service transmission of a document. Users can send an exact copy of a document by using a fax. The Standard Subject Identification Codes (SSICs) provide a method for filing, identifying, and retrieving a document. SSICs are found in the Department of the Navy File Maintenance Procedures and Standard Subject Identification Codes (SSIC), SECNAVINST 5216.11.  The  maintenance  administration  division  uses a  reports  tickler  file  to  tracked  recurring  report requirements. On-the-job training is conducted during actual performance of a maintenance task. The tasks that you will perform as a maintenance administration worker are in direct support of the maintenance   department’s   maintenance   effort. Depending on the activity to which you are assigned, your job may include other tasks, such as personnel evaluation  and  award  recommendation  preparation. Whatever your duties entail, remember that most of the correspondence that you will be tasked with will be transmitted outside of your immediate command. An activity’s  level  of  professionalism  is  often  measured  by the  quality  of  work  of  an  activity’s  maintenance administration  division,  with  correspondence  as  an indicator of quality. As such, the work that you do will reflect directly on the Navy, your command, and you. 2-24