Vendor Classification and Activities
            
            
                    
                        
                
                    
                        | 
                            Service Providers
                         | 
                        
                            Architecture
                         | 
                        
                            AND
                         | 
                    
                
                    
                        | 
                            Service Providers
                         | 
                        
                            Civil engineering
                         | 
                        
                            AND
                         | 
                    
                
                    
                        | 
                            Service Providers
                         | 
                        
                            Electrical and electronic engineering
                         | 
                        
                            AND
                         | 
                    
                
                    
                        | 
                            Service Providers
                         | 
                        
                            Mechanical engineering
                         | 
                        
                            AND
                         | 
                    
                
                    
                        | 
                            Service Providers
                         | 
                        
                            Quantity calculation
                         | 
                        
                            
                         |