Classfication-1 L.According to process: Acute/Subacute/Chronic 2. According to cause: Clear /Not clear 3. According to pathology Granulomatous disease /non-tumor and non inflammatory diseases /non-specific diseases occupational diseases /hyperplastic and tumourous diseases /interstitial lung diseases and honey lungClassfication-1 1.According to process: Acute/Subacute/Chronic 2. According to cause: Clear /Not clear 3. According to pathology Granulomatous disease / non-tumor and non￾inflammatory diseases / non-specific diseases / occupational diseases / hyperplastic and tumourous diseases / interstitial lung diseases and honey lung