Provide an overview of the following organization "Oman Cement Company" 

1. Brief history. 

2. Business size (For the private sector: total number of stock, shares, bonds/ commodities, etc. For the public sector: Total number of employees). 

3. Product lines. For the private sector: list complete range of products/ services of the organization. For the public sector: list the specialty of the organization (who does it serve and how). 

4. Competitors in OMAN only