computer science

Palmtop PC

Palmtop PC is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Palmtop PC rather than just read about it. In short: A Palmtop PC is an obsolete, approximately pocket calculator-sized, battery-powered computer in a horizontal clamshell design with integrated keyboard and display. It could be used like a modern subnotebook, but was light enough to be comfortably used handheld as well.

Key takeaways

Palmtop PC belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Palmtop PC to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Palmtop PC from memory before moving on to harder problems.

Reference excerpt

A Palmtop PC is an obsolete, approximately pocket calculator-sized, battery-powered computer in a horizontal clamshell design with integrated keyboard and display. It could be used like a modern subnotebook, but was light enough to be comfortably used handheld as well. Most Palmtop PCs were small enough to be stored in a user's shirt or jacket pockets. Palmtop PCs distinguish from other palmtop computers by using a mostly IBM-compatible PC architecture, and BIOS as well as an Intel-compatible x86 processor. All such devices were DOS-based, with DOS stored in ROM. While many Palmtop PCs came with a number of PDA and office applications pre-installed in ROM, most of them could also run generic, off-the-shelf PC software with no or little modifications. Some could also run other operating systems such as GEOS, Windows 1.0-3.0 (in Real mode only), or MINIX 2.0. Most Palmtop PCs have been based on a static hardware design for low power consumption, and instant-on/off without the need to reboot. Depending on the model, the battery could power the device for a period ranging from several hours up to several days while running, or between a week and a year in standby mode. Combined with the instant-on/off feature, a battery would typically last from a week up to several months in practical use as PDA. The first Palmtop PC was the DIP Pocket PC (aka Atari Portfolio) in 1989. Palmtop PCs include:

DIP Pocket PC (DIP DOS 2.11, 1989) Atari Portfolio (DIP DOS 2.11, 1989) Poqet PC Classic (MS-DOS 3.3, 80C88, 1989) Poqet PC Prime (MS-DOS 3.3, 80C88) Poqet PC Plus (MS-DOS 5.0, NEC V30) ZEOS Pocket PC (MS-DOS 5.0, 1991) Sharp PC-3000 (MS-DOS 3.3, 1991) Sharp PC-3100 (MS-DOS 3.3, 1991) Hewlett-Packard 95LX (MS-DOS 3.22, NEC V20, 1991) Hewlett-Packard 100LX (MS-DOS 5.0, 80186-compatible HP Hornet, 1993) Hewlett-Packard Palmtop FX (MS-DOS 5.0, 80186-compatible HP Hornet, 1993) Hewlett-Packard 200LX (MS-DOS 5.0, 80186-compatible HP Hornet, 1994) Hewlett-Packard 1000CX (MS-DOS 5.0, 80186-compatible HP Hornet) Hewlett-Packard OmniGo 700LX (MS-DOS 5.0, 80186-compatible HP Hornet, 1996) Some touch-screen computers may also be included in this category:

Hewlett-Packard OmniGo 100 (Datalight ROM-DOS+PEN/GEOS 2.1, NEC V30HL-compatible Vadem VG230, 1993) Hewlett-Packard OmniGo 120 (DOS+PEN/GEOS, NEC V30HL-compatible Vadem VG230)

See also Sub-notebook, not necessarily IBM- and x86- compatible, clamshell design, but larger than Palmtop PCs Handheld PC, not necessarily IBM- and x86- compatible, various form factors Netbook (generic), IBM- and x86- compatible, legacy-free, clamshell design Ultra-mobile PC, a Microsoft specification (IBM- and x86- compatible, legacy-free, not necessarily clamshell design, touchscreen) netBook, StrongARM, clamshell design, touchscreen Pocket PC, a Microsoft specification (ARM-based, various form factors, touchscreen) PalmDOS Electronic organizer PDA (Personal Digital Assistant)

References

Illustrations

Worked examples

Example 1 — a first encounter with Palmtop PC

Start with the simplest possible case. Write down what Palmtop PC claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Palmtop PC before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Palmtop PC ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Palmtop PC

In research: Palmtop PC appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Palmtop PC in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Palmtop PC is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computer hardware stubs, Handheld personal computers, IBM PC compatibles, so understanding it makes those chapters shorter.
In everyday life: Look for Palmtop PC outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Palmtop PC in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Palmtop PC means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Palmtop PC out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Palmtop PC in simple terms?

Why does Palmtop PC matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Palmtop PC?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Palmtop PC.