This sheet just explains the main parts of the workspace that you should see when you open up the program. The screenshot above shows the program open with the most useful pallettes and toolbars. There will be a further info sheet on the tools themselves (in section D on the screenshot).
A - The Menus - Photoshop is a Mac and Windows program. This is the Windows version which has a normal menu structure, with the most common menu options on the left of the menu bar: File, Edit. Then the menu options become Photoshop specific (Image, Layer, Select etc.)
B - Tool Options - This is context sensitive and show the options of whichever tool you currently have selected. Note this toolbar carefully as you work to ensure you understand the options for the currently selected tool.
C - The Layers palette. The palettes are normally on the right hand side of the workspace but can be picked up and dragged to anywhere in the workspace (or outside of it). The Layers palette is one of the most useful - a wide varity of effexts can be achieved by assigning different properties to layers and multiple layers.
D - The Toolbar - Where you select which tool you want to use. (Refer to a subsequent sheet for a guide to each of these).
E - The Colours Pallette - Select the colours you want to use for the relevant tool (brush, line, text etc.). There are three main 'swatches' in this pallette. Or you can quickly set the 'foreground' and 'background' colour by double clicking on the small swatches in the Toolbar (arrowed).