<PAGE>
 
================================================================================

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549
                                --------------

                                     
                                  FORM 10-K/A      

(Mark One)
[X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934

     For the fiscal year ended October 26, 1997

                                      OR

[_]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

     For the transition period from ________ to ________

                         Commission File Number 0-8567

                            DATAMETRICS CORPORATION
            (Exact name of Registrant as specified in its charter)


          Delaware                                       95-3545701
     (State or other jurisdiction of                   (IRS Employer 
     incorporation or organization)                   Identification No.)
                                  
                               26604 Agoura Road      
                              
                           Calabasas, CA  91302-1954      
                   (Address of principal executive offices)

       Registrant's telephone number, including area code (818) 871-0300

          Securities registered pursuant to Section 12(b) of the Act:

 
<TABLE>     
<CAPTION> 

     Title of each class          Name of each exchange on which registered
     -------------------          -----------------------------------------
<S>                               <C> 
Common Stock, $0.01 par value               American Stock Exchange
</TABLE>      

      Securities registered pursuant to Section 12(g) of the Act:  

                                     None.

     Indicate by check mark whether Registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter periods that Registrant
was required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days.  Yes [X] No [_]

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of Registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.  [X]
    
     The aggregate market value of the voting stock held by non-affiliates of
the Registrant (based on the closing price of such stock as reported by the
American Stock Exchange on February 10, 1998) was approximately $18,279,542. 
     
         
     The number of shares outstanding of the Registrant's Common Stock as of
February 10, 1998 was 14,772,830.      

         

================================================================================
<PAGE>
 
    
     The undersigned Registrant hereby amends the following items, financial
statements, exhibits or other portions of its Annual Report on Form 10-K for the
fiscal year ended October 26, 1997 as set forth in the pages attached hereto: 
     

    
     1.   PART III (Including Items 10-13)       Pages 2 - 9
     2.   Signatures                             Page 10      

                                       2
<PAGE>
 
    
     Part III of the Registrant's Annual Report on Form 10-K for the fiscal year
ended October 26, 1997 is amended and restated in its entirety as follows:      

                                    PART III

         
    
ITEM 10.  DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT      
    
     The directors and executive officers of the Company are as follows:      

<TABLE>     
<CAPTION>
NAME                            AGE   POSITION WITH THE COMPANY    DIRECTOR SINCE
-------------------             ---   -------------------------    --------------
<S>                             <C>   <C>                          <C>
 
Daniel P. Ginns                  47   Chief Executive Officer,     October 1996
                                      Secretary and Chairman of
                                      the Board of Directors
 
Adrien A. Maught, Jr.            48   President and a Director     October 1996
 
Kenneth S. Polak                 42   Chief Financial Officer      --
                                      and Assistant Secretary
 
James D. Sturgeon, Jr.           64   Chief Operating Officer      --
 
Douglas S. Friedenberg           46   Director                     October 1996
 
James Haber                      34   Director                     October 1996
 
Stephen R. Gass                  49   Director                     January 1997
</TABLE>     
-------------------
    
     DANIEL P. GINNS has been the Chief Executive Officer, Secretary and
Chairman of the Board of Directors of the Company since October 1996.  Mr. Ginns
also has served as the President of Belmont Capital Inc., a financial and
management advisory firm, for more than the past five years.  Mr. Ginns is also
a Director of StarBase Corporation, a software development company traded on the
Nasdaq SmallCap Market.

     ADRIEN A. MAUGHT, JR. has served as President of the Company since January
1997 and as the Chief Operating Officer and Interim Chief Financial Officer of
the Company from October 1996 to April 1997.  From 1983 to 1996, Mr. Maught
served as the Vice President of the Winchester Partnership, a real estate
development partnership; and from 1991 to 1996, Mr. Maught served as the
President and Chief Executive Officer of Park Plaza, Inc., a parking and
transportation services company.

     KENNETH S. POLAK has been employed by the Company for more than five years
and has served as its Chief Financial Officer since April 1997 and its Assistant
Secretary since November 1996.

     JAMES D. STURGEON, JR. has been employed by the Company for more than five
years and has served as its Chief Operating Officer since April 1997.

     DOUGLAS S. FRIEDENBERG has been the President of Firebird Capital
Management, an investment advisory firm, since 1993.  From July 1991 through
March 1993, Mr. Friedenberg was the President of Unicorn Capital Management, a
hedge fund manager.  For more than five years prior thereto, Mr. Friedenberg
managed investor portfolios for Morgan Stanley & Company.  Mr. Friedenberg is a
director of Stratford Acquisition Corporation (to be renamed Novacrete
Technology Inc.), a manufacturer of additives for cement-based products that is
traded on the Nasdaq Over-the-Counter Bulletin Board.

     JAMES HABER has been the sole general partner of Infiniti Investment Fund
L.P., an investment fund, since May 1991. Mr. Haber also has served as the
trading advisor of Tendencia Overseas Fund, Ltd., an investment company, since
October 1993.

     STEPHEN R. GASS has been employed by Arthur A. Watson & Co., Inc., a
private insurance company, since 1976 where he currently serves as an Executive
Vice President.  Since December 1997, Mr. Gass also has served as the President
of Hickory Hill Capital Management L.L.C., a capital investment company.

     There are no family relationships among any of the Company's directors and
executive officers.     

                                       3
<PAGE>
 
    
            SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     Section 16(a) of the Securities Exchange Act of 1934 requires the Company's
officers and directors, and persons who own more than ten percent of a
registered class of the Company's equity securities, to file reports of
ownership and changes in ownership with the Securities and Exchange Commission.
Officers, directors and greater than ten-percent stockholders are required by
regulations promulgated by the Securities and Exchange Commission to furnish the
Company with copies of all Section 16(a) forms that they file.

     With reference to transactions during the period October 28, 1996 through
October 26, 1997, to the Company's knowledge, based solely on review of the
copies of such reports furnished to the Company and written representations, no
other reports were required.  All Section 16(a) filing requirements applicable
to its officers, directors and greater than ten percent stockholders were 
met.     

                                       4
<PAGE>
 
    
ITEM 11.  EXECUTIVE COMPENSATION     
                               
                           SUMMARY COMPENSATION TABLE     
    
     The following table shows, for the fiscal years ended October 29, 1995,
October 27, 1996 and October 26, 1997 ("fiscal 1997"), the compensation earned
by the current Chief Executive Officer of the Company and the four most highly
compensated executive officers of the Company at the end of fiscal 1997 (the
foregoing persons are hereinafter referred to as the "Named Executive
Officers").     

<TABLE>    
<CAPTION>                                                                          
                                                                                   LONG-TERM COMPENSATION 
                                                                         -----------------------------------------
                                        ANNUAL COMPENSATION                  AWARDS                   PAYOUTS       
                                 ----------------------------------      -----------------------------------------
                                                            OTHER      
                                                            ANNUAL       RESTRICTED     SECURITIES     LONG-TERM           
                                                            COMPEN-        STOCK        UNDERLYING      INCENTIVE     ALL OTHER    
 NAME AND PRINCIPAL                                         SATION        AWARD(S)       OPTIONS/         PLAN        COMPEN-      
    POSITION(S)        YEAR     SALARY ($)    BONUS($)      ($)(3)          ($)           SARs(#)       PAYOUTS($)    SATION ($)   
--------------------  ------   -----------   ---------     ---------     ----------     ----------    ------------   ----------- 
<S>                   <C>      <C>           <C>           <C>           <C>            <C>           <C>            <C>
Daniel P. Ginns        1997     261,035(1)      24,000     27,000(4)         --            700,000         --             --
  Chief Executive
  Officer, Secretary   1996         17,500          --            --         --             15,000         --             -- 
  and Chairman of the  1995             --          --            --         --                 --         --             -- 
  Board of Directors    

Adrien A. Maught, Jr.  1997     219,901(2)      21,500       7,500(4)        --            500,000         --             -- 
  President and a      1996         13,500          --             --        --             15,000         --             -- 
  Director             1995             --          --             --        --                 --         --             -- 

Kenneth S. Polak       1997        103,389          --             --        --              1,750         --             --
  Chief Financial      1996         99,224          --             --        --              5,000         --             -- 
  Officer and
  Assistant Secretary  1995         97,120       1,123             --        --              2,000         --             -- 
 
James D. Sturgeon, Jr. 1997        123,882          --             --        --              1,750         --             -- 
 Chief Operating       1996        118,646          --             --        --             10,000         --             -- 
 Officer               1995        111,911       1,583             --        --              4,000         --             -- 
 
William J. Foti        1997         72,681          --      27,143(5)        --              1,750         --             --
Vice President         1996         89,383          --      67,772           --             10,000         --             -- 
                       1995         86,244       1,221      50,270           --              4,000         --             --
</TABLE>     

---------------------------
    
(1)  Includes related party payments of $72,250 for fees paid to Belmont Capital
     Inc. for consulting services prior to becoming an employee of the
     Company.    
    
(2)  Includes related party payments of $45,750 for fees paid to Belmont Capital
     Inc. for consulting services prior to becoming an employee of the
     Company.    
    
(3)  Does not include perquisites to each of the Named Executive Officers that
     did not exceed the lesser of $50,000 or 10% of the total salary and bonus
     for such officer.     
    
(4)  Directors fees.     

    
(5)  Other annual compensation to Mr. Foti represents commissions on sales
     orders booked.  Mr. Foti's employment with the Company ended in June 
     1997.     

                                       5

 
<PAGE>
 
    
                        STOCK OPTION GRANTS IN FISCAL 1997

          The following table sets forth information regarding the grant of
stock options during fiscal 1997 to the Named Executive Officers:      

<TABLE>    
<CAPTION>
 
                                                                                                                                  
                                                                                                         POTENTIAL                
                                                                                                     REALIZABLE VALUE             
                                                INDIVIDUAL GRANTS(1)                                 AT ASSUMED ANNUAL            
                                ---------------------------------------------------------------        RATES OF STOCK             
                                                   PERCENT OF                                              PRICE                  
                                                 TOTAL OPTIONS                                        APPRECIATION FOR            
                                  NUMBER OF        GRANTED TO       EXERCISE                           OPTION TERM($)             
                                   OPTIONS        EMPLOYEES IN     PRICES PER       EXPIRATION       --------------------         
     NAME                          GRANTED        FISCAL 1997       SHARE($)          DATE(2)             5%        10%           
---------------------           ------------    ---------------   -----------      ------------      ----------  ---------        
<S>                             <C>             <C>               <C>              <C>               <C>         <C>              
Daniel P. Ginns                     700,000(2)       51.50%           $2.00          11/13/2001        $  0(4)   $9,170(4)        
Adrien A. Maught, Jr.               500,000(2)       36.78             2.00          11/13/2001           0(4)    6,550(4)        
James D. Sturgeon, Jr.                1,750(3)        0.13             1.50          03/31/2002           725     1,603           
Kenneth S. Polak                      1,750(3)        0.13             1.50          03/31/2002           725     1,603           
William J. Foti                       1,750(3)        0.13             1.50          03/31/2002           725     1,603           
</TABLE>     

-----------------------
    
(1)  No stock appreciation rights were granted to any of the Named Executive
     Officers or other employees of the Company in fiscal 1997.
(2)  Warrants became exercisable upon their grant on November 13, 1996.
(3)  Exercisable after one year.
(4)  Market price of the Common Stock at time of grant was $1.25 per share based
     on the closing price as reported by the American Stock Exchange on November
     13, 1996.     

    
                   AGGREGATED OPTION EXERCISES IN FISCAL 1997
                       AND OCTOBER 26, 1997 OPTION VALUES

     The following table sets forth information with respect to the Named
Executive Officers concerning the exercise of options during fiscal 1997 and
unexercised options held at the end of fiscal 1997.     

<TABLE>    
<CAPTION>
 
                                                                  NUMBER OF SECURITIES               VALUE OF UNEXERCISED IN-THE- 
                                                                  UNDERLYING UNEXERCISED                 MONEY OPTIONS AT         
                                                               OPTIONS AT OCTOBER 26, 1997 (#)         OCTOBER 26, 1997($)        
                            SHARES ACQUIRED        VALUE       -------------------------------       ----------------------------
      NAME                  ON EXERCISE (#)     REALIZED($)     EXERCISABLE/UNEXERCISABLE              EXERCISABLE/UNEXERCISABLE 
-------------------      -------------------   ------------   --------------------------------       ----------------------------
<S>                      <C>                   <C>            <C>             <C>                      <C>          <C> 
Daniel P. Ginns                   0                 0               703,750   11,250                        6,563   19,688 
Adrien A. Maught, Jr.             0                 0               503,750   11,250                        6,563   19,688 
James D. Sturgeon, Jr.            0                 0                56,250    9,500                       70,000    3,063 
Kenneth S. Polak                  0                 0                13,124    7,751                            0    3,063 
</TABLE>     

                                       6
<PAGE>
 
    
DIRECTORS COMPENSATION

          In October 1996, the Board of Directors consisted of the following
members: Adrien A. Maught, Jr., Douglas S. Friedenberg, James Haber and Daniel
P. Ginns.  Stephen R. Gass became a director in January 1997.  As Chairman of
the Board, Mr. Ginns received an annual retainer fee of $27,000 in fiscal 1997
and will receive an annual retainer fee of $32,000 in fiscal year 1998.  All
other directors received annual retainer fees of $7,500 in fiscal 1997 and will
receive annual retainer fees of $12,500 in fiscal year 1998.  In fiscal 1997,
each director was issued 10,000 shares of Common Stock in addition to the above
retainer fees. In fiscal year 1998, the Company issued to each director 10,000
shares of Common Stock in addition to the above retainer fees for fiscal year
1998.

EMPLOYMENT CONTRACTS AND TERMINATION OF EMPLOYMENT ARRANGEMENTS

          In January 1997, the Company entered into employment agreements with
Mr. Ginns as Chief Executive Officer of the Company, and Mr. Maught as President
of the Company.  Each of these agreements currently terminates on December 31,
2002, but automatically renews on July 1 of each year so that the remaining term
of each agreement will not be less than four and one-half years. Under these
agreements, Mr. Ginns and Mr. Maught are paid an initial annual base salary of
$240,000 and $215,000, respectively. For each calendar year commencing with the
calendar year beginning January 1, 1998, the base salary under these agreements
is adjusted by the greater of 3% or a percentage equal to the percentage change
in the Consumer Price Index for the year then ended from the prior calendar
year. In addition to the base salary, the Compensation Committee of the Board of
Directors may, in its sole discretion, pay a performance-based bonus to Mr.
Ginns or Mr. Maught in any year during the term of their respective agreements.

          The Company has the right to terminate Mr. Ginns' or Mr. Maught's
employment without cause at any time; provided, however, that Mr. Ginns and Mr.
Maught each shall be entitled to payment of his base salary for a period equal
to the greater of one year from the date of termination or the remainder of the
employment agreement; and the Company shall continue to provide to each such
executive (and each member of his immediate family) all benefits provided by the
employment agreement.  In addition, upon termination in connection with a
certain change in control of the Company, Mr. Ginns and Mr. Maught each shall be
entitled to a cash payment equal to the lesser of three years' base salary or
the maximum amount which would not result in any portion of such payment being
subject to the excise tax under Section 4999 of the Internal Revenue Code.

          In connection with these employment agreements, the Company granted
Mr. Ginns and Mr. Maught warrants to purchase up to 700,000 and 500,000 shares,
respectively, of the Company's Common Stock at a purchase price of $2.00 per
share. All of these warrants are immediately exercisable and have a term of five
years.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

          During fiscal 1997, Messrs. Haber, Friedenberg and Gass served on the
Compensation Committee of the Company's Board of Directors.  No member of the
Compensation Committee was or is an officer or employee of the Company.  Mr.
Gass is an Executive Vice President and stockholder of Arthur A. Watson & Co.,
Inc., a private insurance company.  During fiscal 1997, the Company paid
$371,225 and $450,000 to Arthur A. Watson & Co., Inc. for liability and medical
insurance, respectively.  There were no Compensation Committee interlocks or
insider participation during fiscal 1997.     

                                       7
<PAGE>
 
    
ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

                             PRINCIPAL STOCKHOLDERS

     The following table sets forth, as of February 10, 1998, the number and
percentage ownership of the Company's Common Stock by each director of the
Company, certain executive officers and by all officers and directors of the
Company as a group.  To the Company's knowledge, except as set forth below, no
person or entity owns 5% or more of the Company's Common Stock.  Except as
otherwise indicated, and subject to applicable community property and similar
laws, each of the persons named has sole voting and investment power with
respect to the shares of Common Stock shown as beneficially owned.     

<TABLE>    
<CAPTION>
 
 
                                            AMOUNT AND NATURE OF BENEFICIAL                     PERCENTAGE OF                    
          NAME AND ADDRESS(1)                          OWNERSHIP                              OUTSTANDING SHARES 
--------------------------------------    ------------------------------------        --------------------------------
<S>                                        <C>                                            <C> 
Directors
     James Haber                                     1,327,225(2)                                    9.0%                   
     Douglas S. Friedenberg                            986,496(3)                                    6.7                    
     Daniel P. Ginns                                   725,625(4)                                    4.9                    
     Adrien A. Maught, Jr.                             525,625(5)                                    3.6                    
     Stephen R. Gass                                    38,750(6)                                      *                    

     James D. Sturgeon, Jr.                             70,363(7)                                      * 
     Kenneth S. Polak                                   20,956(8)                                      * 
     William J. Foti                                    27,561                                         * 
All Officers and Directors as a group(8)             3,786,761                                      25.6% 
</TABLE>     

---------------------
    
*    Less than 1%.
(1)  The addresses of all persons listed is c/o Datametrics Corporation, 26604
     Agoura Road, Calabasas, California  91302-1954.
(2)  Included in the amount are 125,625 shares of Common Stock which Mr. Haber
     has sole voting and investment power.  The remaining shares are owned
     beneficially through various investment funds.  Includes 100,000 shares
     subject to warrants presently exercisable which have an exercise price of
     $2.00 and expire on February 5, 2002.  Includes 5,625 shares subject to
     non-qualified stock options which have an exercise price of $1.25 and
     expire on October 8, 2001.  Excludes 9,375 shares subject to non-qualified
     stock options which have an exercise price of $1.25 and expire on October
     8, 2001.
(3)  Includes 220,004 shares subject to warrants which are presently
     exercisable.  Of such warrants 120,004 warrants have an exercise price of
     $1.50 and expire on November 25, 2001 and 100,000 warrants have an exercise
     price of $2.00 and expire on February 5, 2002.  Includes 5,625 shares
     subject to non-qualified stock options which have an exercise price of
     $1.25 and expire on October 8, 2001.  Excludes 9,375 shares subject to non-
     qualified stock options which have an exercise price of $1.25 and expire on
     October 8, 2001.  Also included in the amount are 158,125 shares of
     common stock which Mr. Friedenberg has sole voting and investment power.
     The remaining shares are owned beneficially through various investment
     funds.
(4)  Includes 700,000 shares subject to warrants which are presently
     exercisable, have an exercise price of $2.00 and expire on November 13,
     2001.  Includes 5,625 shares subject to non-qualified stock options which
     have an exercise price of $1.25 and expire on October 8, 2001.  Excludes
     9,375 shares subject to non-qualified stock options which have an exercise
     price of $1.25 and expire on October 8, 2001.
(5)  Includes 500,000 shares subject to warrants which are presently
     exercisable.  These warrants have an exercise price of $2.00 and expire on
     November 13, 2001.  Includes 5,625 shares subject to non-qualified stock
     options which have an exercise price of $1.25 and expire on October 8,
     2001.  Excludes 9,375 shares subject to non-qualified stock options which
     have an exercise price of $1.25 and expire on October 8, 2001.
(6)  Includes 3,750 shares subject to non-qualified stock options which have an
     exercise price of $1.4375 and expire on January 31, 2002.  Excludes 11,250
     shares subject to non-qualified stock options which have an exercise price
     of $1.4375 and expire on January 31, 2002.
(7)  Includes 60,375 shares subject to qualified stock options.  Of such options
     40,000 options have an exercise price of $1.25 and expire on March 7, 1999,
     10,000 options have an exercise price of $2.8750 and expire on December 17,
     1998, 3,000 options have an exercise price of $2.125 and expire on February
     22, 2000, 5,625 options have an exercise price of $2.125 and expire on 
          
     
                                       8
<PAGE>
 
    
     December 14, 2000 and 1,750 options have an exercise price of $1.50 and
     expire on March 31, 2002.  Excludes 5,375 shares subject to qualified stock
     options. Of such options, 1,000 options have an exercise price of $2.125
     and expire on February 22, 2000 and 4,375 options have an exercise price of
     $2.125 and expire on December 14, 2000.      
(8)  Includes 18,187 shares subject to qualified stock options.  Of such
     options, 2,500 options have an exercise price of $2.8750 and expire on
     December 17, 1998, 9,625 options have an exercise price of $2.6875 and
     expire on April 8, 1998, 1,500 options have an exercise price of $5.75 and
     expire on February 22, 2000, 2,812 options have an exercise price of
     $7.8750 and expire on December 14, 2000 and 1,750 options have an exercise
     price of $1.50 and expire on March 31, 2002.  Excludes 2,688 shares subject
     to qualified stock options.  Of such options, 500 options have an exercise
     price of $5.75 and expire on February 22, 2000 and 2,188 options have an
     exercise price of $7.875 and expire on December 14, 2000.


ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

    
          During fiscal 1997, the Company paid consulting fees in the amount of
$118,000 to Belmont Capital Inc., an entity of which Mr. Ginns is the President
and the sole stockholder.  These payments were made prior to Messrs. Ginns and 
Maught's employment with the Company which commenced on January 3, 1997.

          In addition, during fiscal 1997, the Company paid $371,225 and
$450,000 for liability and medical insurance, respectively, to Arthur A. Watson
& Co., Inc., an entity of which Mr. Gass is an Executive Vice President and
stockholder.  The Company paid no more than it would have paid to another 
insurance company.      

                                       9
<PAGE>
 
    
                                   SIGNATURES

     Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                    DATAMETRICS CORPORATION



Date:  February 20, 1998          By: /s/ Daniel P. Ginns
                                     ________________________________________
                                     Daniel P. Ginns, Chief Executive Officer


     Pursuant to the requirements of the Securities Exchange Act of 1934, this
report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated.     

<TABLE>   
<CAPTION>


          SIGNATURE                         TITLE                                                               DATE
          ---------                         -----                                                               ----
<S>                             <C>                                                                       <C>

   /s/ Daniel P. Ginns          Chief Executive Officer, Secretary and Chairman of                        February 20, 1998
-----------------------------   the Board of Directors
      Daniel P. Ginns

  /s/ Adrien A. Maught, Jr.     President, Chief Operating Officer and Director                           February 20, 1998
-----------------------------
     Adrien A. Maught, Jr.


   /s/ Kenneth S. Polak         Chief Financial Officer and Assistant Secretary                           February 20, 1998
-----------------------------   (Principal Financial and Accounting Officer)
      Kenneth S. Polak


  /s/ Douglas S. Friedenberg    Director                                                                  February 20, 1998
-----------------------------
   Douglas S. Friedenberg


      /s/ James Haber           Director                                                                  February 20, 1998
-----------------------------
        James Haber



   /s/ Stephen R. Gass          Director                                                                  February 20, 1998
-----------------------------
     Stephen R. Gass
</TABLE>    

                                       10