SharePoint 2010, Comparison of SharePoint Main Objects Between Client Object Models

Server

.NET Managed Code and Silverlight

JavaScript

Microsoft.SharePoint.SPContext

Microsoft.SharePoint.Client.ClientContext

SP.ClientContext

Microsoft.SharePoint.SPSite

Microsoft.SharePoint.Client.Site

SP.Site

Microsoft.SharePoint.SPWeb

Microsoft.SharePoint.Client.Web

SP.Web

Microsoft.SharePoint.SPList

Microsoft.SharePoint.Client.List

SP.List

Microsoft.SharePoint.SPListItem

Microsoft.SharePoint.Client.ListItem

SP.ListItem

Microsoft.SharePoint.SPField

Microsoft.SharePoint.Client.Field

SP.Field