Wang Booth at U.S. Trade Center Show in Stockholm, Sweden, September, 1970.
Booth featured the newly available Wang 700-Series Calculators.
Photo shows early Wang 700-series calculator connected to a Model 701 Output Writer.
Note that the 700-Series calculator pictured does not have the 'add on' fan on the back.
Early Wang 700 calculators did not come with the fan, and had major overheating problems.