(Reproduced from ) (a) The state of CMB anisotropy detections in 1993. The points are from COBE , Python , MAX  and IAB . Also shown is the upper limit from the OVRO NCP experiment . (b) The state of the field in early 1998. Shown are COBE , FIRS , Tenerife , SP94 , Python , ARGO , MAX , Saskatoon , CAT , and the OVRO RING5M . (The solid line is a CDM model with , and , and is also indicative of the state of late 20th century cosmology).