Many are turning to specialisation, focusing on transportation of specific categories of goods in competitive fields. By contrast, others strive to diversify their portfolio of services and develop a presence in multiple market niches – such as in logistics for both general and specialised freight. It is worth noting that airfreight is generally broken down into two categories – general freight (cargo which can be transported on standard cargo pallets), and specialised freight. The latter normally includes oversized and exceedingly heavy types of cargo.