Lincoln Savings and Loan and First Federal Savings Bank of Annapolis are among 18 failed thrifts that the Resolution Trust Corp. announced it is putting up for sale. The failure of Lincoln, formerly owned by Charles Keating Jr., is costing taxpayers an estimated $2 billion.

Electronic Data Systems canceled a multibillion-dollar deal with Continental for half the airline's reservations system. Meanwhile, Continental said it may be forced to sell some international routes and lay off workers if it wants to avoid another round of bankruptcy reorganization.

United Merchants and Manufacturers, blaming its long-term debt, said it and two subsidiaries filed for Chapter 11 federal bankruptcy protection.

Mortgage rates fell this week. Rates on 30-year fixed mortgages fell to an average 10.13 percent from 10.17 percent last week, while one-year adjustable-rate notes fell to 8.15 percent from 8.17 percent, the Federal Home Loan Mortgage Corp. said.

Perrier reported that profit more than doubled in the first half of 1990 despite a worldwide recall after chemicals turned up in its water. The increase came mostly from the sale of the company's soft-drink operations.

Standard & Poor's downgraded its ratings on the subordinated debt of Baltimore Bancorp and the Bank of Baltimore's certificates of deposit.

Geico plans to acquire Atlanta-based Southern Heritage Insurance for about $16.6 million.

Home Team Sports, the Washington-based cable TV sports network, will gain programming under an agreement with Affilated Regional Communications of Denver. HTS's parent, Group W Satellite Communications, agreed to give ARC a minority stake in HTS in exchange for a similar stake in ARC's cable TV sports ventures.

Visa credit cards will be issued by China's largest retail bank, serving nearly half the country's 1.18 billion people. The Industrial and Commercial Bank of China is the second bank in the country to issue the cards. Meanwhile, Visa International said a Prague bank has issued the first internationally accepted Visa cards to Czechoslovak citizens.

A Pan Am stockholder filed suit seeking to stop the pending sale of some of the airline's European routes to United Airlines and have the routes put up for sale to the highest bidder.

Chrysler and Fiat, citing sluggish sales, ended talks on possible joint ventures, the companies said.