C H A P T E R 4

Pickers

A list picker does not include a title because the picker’s context should make its purpose clear. The picker may contain scroll arrows, a Close box, and other controls as described in “Using a List Picker” on page 4-9.

Check Marks

A check mark () has special meaning in a list picker. In a picker that lists attributes, values, or states, a check mark indicates which picker item is in effect. A check mark is not used in a list of commands because no command is in effect until the user picks one. Also, check marks are not shown for picker items with an icon.

Icons

Icons are completely optional in list pickers; in fact, there are several reasons to avoid them. Use icons to clarify and distinguish the wording of picker items, but not purely for decoration. For a discussion of the pros and cons of icons in list pickers, see “Icons in a Picker” on page 5-12.

Item Names

In a list picker, use one word for item names when possible, and capitalize it. When you must use more than one word, you should generally capitalize just the first word. You can capitalize differently if it makes sense in a particular context. For example, the items in the Date Book’s Show picker are titles of views and are capitalized like book titles. If the text of a picker item ends a sentence begun by a picker label, you should capitalize the label like a sentence and not capitalize the picker items at all (except for proper nouns). The Find slip’s Look For picker is an example of sentence capitalization.

Avoid punctuation and symbols in list pickers. Except for very common symbols such as an ampersand (&), users find symbols ambiguous. In parti- cular, do not put an ellipsis (...) at the end of a picker item that will bring up a slip. Unlike menus on personal computers, Newton pickers do not use an ellipsis or any other symbol to indicate a command that will need more information from the user.

List Pickers

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Apple 2 manual Check Marks, Icons, Item Names

2 specifications

The Apple II is a defining product in the history of personal computing, first introduced in 1977 by Apple Computer, Inc. Designed by Steve Wozniak, the Apple II was one of the first highly successful mass-produced microcomputer products and played a significant role in bringing personal computers into homes and schools.

One of the Apple II's standout features was its color graphics capability. It was one of the first personal computers to provide color output, thanks to its built-in video interface. The initial model supported a resolution of 280x192 pixels with a palette of 6 colors, which allowed for vibrant visuals that set it apart from contemporaries like the monochrome Altair 8800.

The Apple II was notable for its open architecture. This design allowed users to expand the computer's capabilities easily through a series of expansion slots. Users could add floppy disk drives, additional memory, and various peripheral devices, making the system highly adaptable to individual needs. This encouraged a thriving ecosystem of third-party hardware and software, which contributed to its popularity.

Another significant feature was its use of the 6502 microprocessor. This 8-bit CPU was not only affordable but also powerful for its time, allowing the Apple II to run various applications efficiently. Along with a built-in keyboard and an innovative plastic case that housed its components, the design was user-friendly and appealing.

The Apple II also introduced the concept of “bootable software” through the use of floppy disks. The disk operating system (DOS) allowed users to store and run multiple programs without having to reload software manually, providing a level of convenience that had not been widely available before. Key software like VisiCalc, the first spreadsheet program, helped boost sales, showcasing the Apple II's utility in business and education environments.

The computer was also well-known for its early adoption of BASIC programming language. Apple provided an operating system that supported Applesoft BASIC, which enabled users, including students, to write their programs, further fostering a community of developers.

In summary, the Apple II's color graphics, open architecture, powerful 6502 processor, innovative use of floppy disks, and support for BASIC programming made it a revolutionary product in its time. Its legacy laid the groundwork for future personal computers and established Apple as a leader in the burgeoning tech industry. The Apple II remains an iconic symbol of the early personal computing era, reflecting a generation's transition into a digitally connected world.