15940 Luanne Dr. Gaithersburg, Md. 20877 REVENUE: $4.1 million PROFITS: $104,155 EARNINGS PER SHARE: 3 cents DIVIDEND: None ASSETS: $1.9 million STOCKHOLDERS' EQUITY: $1.1 million RETURN ON EQUITY: 9.5 percent EXCHANGE: OTC EMPLOYES: 41 TOP EXECUTIVES: William Culver, chairman; George Konkol, president. FOUNDED: 1972

DESCRIPTION: Optelecom designs and manufactures fiber-optic products for the government and private industry, including lasers for use in military night-vision systems.

DEVELOPMENTS: Profits surged 56 percent for Optelecom in the fiscal year ended Dec. 31, largely as a result of revenue realized in 1985 from a $1.4 million Air Force contract received in 1984 to develop night-vision flight systems. The company reversed a net loss of $82,154 in fiscal 1984 in reporting profits for the most recent fiscal year.

Company executives say increased research and development for the military, including work on FOG-M, a fiber-optic guided missile that has attracted the attention of high-ranking Pentagon officials, will continue to boost revenue in the coming year. The FOG-M, successfully demonstrated recently at the Army Missile Command in Huntsville, Ala., is a potentially inexpensive and extremely precise guided missile that can be field-launched by a single combatant and directed to a target with pinpoint accuracy. #96. TVI CORP.

10700 Hanna St. Beltsville, Md. 20705 REVENUE: $4 million PROFITS: $125,175 EARNINGS PER SHARE: 2 cents DIVIDEND: None ASSETS: $4.3 million STOCKHOLDERS' EQUITY: $1.9 million RETURN ON EQUITY: 7.2 percent EXCHANGE: OTC EMPLOYES: 53 TOP EXECUTIVE: Charles R. McConnell, chairman, president and chief financial officer. FOUNDED: 1977

DESCRIPTION: TVI Corp. designs and manufactures thermal targets and other infrared thermal simulants and training devices for the Department of Defense. The company also makes radiant heating panels for residential use.

DEVELOPMENTS: After a devastating fire broke out at TVI's facilities on Herzel Place in Beltsville in early 1985, which destroyed the building and brought operations to a halt for two weeks, the company concentrated on getting its military production program back on its feet.

The company managed to exceed last year's revenue by $200,000, but the fire cost the company one quarter's worth of production, and TVI's 1985 profits plummeted 32 percent to $125,175 (2 cents a share), compared with profits a year ago of $185,000 (3 cents).

The company recently licensed Solid State Heating Corp. of New Canaan, Conn., to manufacture and distribute its residential heating panels in an arrangement that also guarantees annual purchases of heating elements from TVI. TVI also has said it will diversify into the medical service business and has signed a letter of intent to acquire Trilogic Corp. of Reston in a stock swap. The company has just moved into new facilities. #97. WASHINGTON CORP.

5550 Friendship Blvd. Suite 510 Chevy Chase, Md. 20815 REVENUE: $3.8 million PROFITS: $1.1 million EARNINGS PER SHARE: 51 cents DIVIDEND: None ASSETS: $27.3 million STOCKHOLDERS' EQUITY: $9.8 million RETURN ON EQUITY: 11.2 percent EXCHANGE: Philadelphia EMPLOYES: 11 TOP EXECUTIVE: William N. Demas, chairman and president. FOUNDED: 1969

DESCRIPTION: Washington Corp. acquires, develops and syndicates commercial and residential real estate in the Washington area.

DEVELOPMENTS: Despite a 26 percent increase in revenue for the fiscal year ended Dec. 31, Washington Corp. reported a 16 percent drop in net income. The company attributed the drop to unusual nonoperating gains in fiscal 1984 from the redemption of debentures it held.

The company recently broke ground on a new 60,000-square-foot office building in the 50 West Office Park in Fairfax that is expected to be completed in October. In November, construction will start on a second new office building in the same complex, where the company plans to develop a total of three buildings. #98. VERDIX CORP.

14130-A Sullyfield Circle Chantilly, Va. 22201 REVENUE: $3.7 million LOSS: $903,711 LOSS PER SHARE: 13 cents DIVIDEND: None ASSETS: $4.6 billion STOCKHOLDERS' EQUITY: $3 million RETURN ON EQUITY: NA EXCHANGE: OTC EMPLOYES: 97 TOP EXECUTIVES: George Cowan, president and chief executive officer; Donn Milton, executive vice president. FOUNDED: 1982

DESCRIPTION: Verdix Corp. is engaged in the design, development, manufacture and marketing of software products and secure computer systems. These systems are implemented in the Ada programming language, now required by the Defense Department for "mission critical" defense systems.

DEVELOPMENTS: Verdix may have vaulted into the Washington Post's Top 100 this year, but the real news is its partnership with the Top 100's No. 1 company: Martin Marietta.

Last March, the giant defense/aerospace company agreed to purchase 22 percent of Verdix, and received a 10-year warrant to purchase another million shares of Verdix stock for $6 a share.

A standstill agreement limits Marietta's ownership stake to 25 percent until December 1987 and to 35 percent until 1989.

Marietta's interest in Verdix was prompted by the increasing importance of software's role in advanced defense systems; ADA -- the Pentagon's computer language standard -- is Verdix's specialty.

Verdix cracked into the financial black for the first time in the last quarter of the year due in part to the rising number of large defense contractors requiring ADA tools and capabilities. For example, Boeing Co. awarded a contract valued at more than $300,000 to Verdix in November.

Verdix also has struck licensing agreements with companies ranging from National Semiconductor to Tolerant Systems Inc. to Convex Computer Corp. to establish its position as a key supplier of ADA technology. #99. TECH SERV INC.

5301 Holland Dr. Beltsville, Md. 20705 REVENUE: $2.9 million PROFITS: $239,962 EARNINGS PER SHARE: 42 cents DIVIDEND: None ASSETS: $1.4 million STOCKHOLDERS' DEFICIT: $33,560 RETURN ON EQUITY: NA EXCHANGE: OTC EMPLOYES: 51 TOP EXECUTIVE: Frank L. Goodwin Jr., president. FOUNDED: 1960

DESCRIPTION: Tech Serv manufactures miniature aerial target systems for use in military training and radio-control equipment for target guidance systems.

DEVELOPMENTS: Despite renewal of a five-year Army contract for manufactured aerial targets, Tech Serv continued to struggle for profitability in fiscal 1985 after reporting a loss of $502,950 (88 cents a share) in fiscal 1984. For the six months ending Dec. 31 in the current fiscal year, Tech Serv reported revenue of $1.9 million, compared with $1.3 million for the same period last year. Net income for the first half was $827,189 ($1.44), compared with $61,530 (11 cents) a year earlier.

However, in December, the company sold its plant and office facilities for $1.04 million in cash and realized a gain of $785,000. Approximately $650,000 of the proceeds from the sale were used to pay off outstanding deeds and loans. The company has negotiated a long-term lease for the property where it intends to continue operations. In reports filed for the first six months of this year, the company notes that net income from operations was slightly lower than in the similar period last year, primarily as the result of higher selling and administrative costs related to new products. #100. SYSTEMS TECHNOLOGY ASSOCIATES INC.

14 Bryant Ct. Sterling, Va. 22170 REVENUE: $2.5 million PROFITS: $165,757 EARNINGS PER SHARE: 8 cents DIVIDEND: None ASSETS: $4.3 million STOCKHOLDERS' EQUITY: $3.5 million RETURN ON EQUITY: 8 percent EXCHANGE: OTC EMPLOYES: 43 TOP EXECUTIVE: Marvin F. Friedland, chairman and president. FOUNDED: 1966

DESCRIPTION: Systems Technology is a computer hardware and software firm involved in systems research and development.

DEVELOPMENTS: Systems Technology reported a 54 percent drop in net income for the fiscal year ended last May 31. Revenue for the year was off 13 percent. The sharp drop in net income is attributed to increased cost of research and development, higher interest costs and expenses related to product development. The company also encountered unexpected delays, and added costs, in modifications introduced on earlier systems delivered to customers.

The strong U.S. dollar in overseas markets last year also hurt company performance in the first half of the current fiscal year. For the six months ended Dec. 31, the company reported revenue of $1 million and a net loss of $98,916, compared with revenue of $1.3 million and net income of $126,333 for the similar period a year earlier. The weaker dollar is expected to help improve company performance in the second half of fiscal 1986. Between 85 percent and 95 percent of the company's revenue is derived from overseas clients.