What do you think is most useful "notebook" or "PDA"?!!

Health Effects Notebook The chemical fact sheets contained in this notebook provide a hazard summary for each of the hazardous air pollutants (except 2,3,7,8-tetrachlorodibenzo-p-dioxin and mineral fibers, which are under review by the U.S. Environmental Protection Agency [EPA]) specified in the Clean Air Act Amendments of 1990. These brief summaries are intended to provide a quick reference for pertinent toxicity information and to indicate where more comprehensive and primary information can be found. This information is targeted to those concerned with toxic air pollutants at the State and local levels. The information in the fact sheets is summarized from EPA databases, and, where EPA data are lacking, information from other sources has been added for a more complete picture of possible toxicity concerns. The fact sheets should be used as one of many information sources for understanding a pollutant's human health hazard potential. In the case of listed compound categories, one or more representative compounds have been selected for the fact sheet summary. The fact sheets do not represent EPA policy on health hazards and they should not be construed as constituting an EPA judgment about a hazard where a judgment does not already exist. In addition, they cannot be cited or quoted as a primary source of EPA health hazard information. Appendix A, Section 1, contains a glossary of health, exposure, and risk assessment terms and the definitions of acronyms used in the graphs that accompany the fact sheets. Appendix A, Section 2, discusses related terms frequently encountered in health, exposure, and risk assessments. Appendix B (WordPerfect 5.1 file) is a hazardous air pollutants' Fact Sheet chemical cross reference, which contains an alphabetical listing of all the chemicals and their most common synonyms contained in this Notebook and the page number of the associated fact sheet. GENERAL INFORMATION This health effects notebook contains fact sheets on hazardous air pollutants. These chemicals include volatile organic chemicals, chemicals used as pesticides and herbicides, inorganic chemicals, and radionuclides. Many of these chemicals are used for a variety of purposes in the United States today. Other chemicals, although not in use today, were used extensively in the past and may still be found in the environment. These fact sheets were developed based on available human and/or animal data. The human data consist primarily of epidemiological studies, which are studies that examine the incidence, distribution, and control of disease in the human population. The primary type of epidemiologic studies used in the development of these fact sheets were occupational studies, which examined the effects of a chemical on a group of workers over time. The animal data are from studies that experimentally exposed animals to chemicals to observe and measure toxicity and disease development. These studies include effects data related to acute (short-term) exposures, subchronic (medium-length) exposures, and chronic (long-term) exposures. The primary sources of information used to develop the fact sheets were EPA's Integrated Risk Information System (IRIS),(http://www.epa.gov/ngispgm3/iris/index.html), a database that summarizes available toxicity data and contains EPA's assessment of the data, and secondary sources, such as EPA's Health Assessment Documents, EPA's Drinking Water Criteria Documents, EPA's Health Effects Assessment Summary Tables (HEAST), and the Agency for Toxic Substances and Disease Registry (ATSDR) Toxicological Profiles(http://atsdr1.atsdr.cdc.gov/toxfaq.html). In addition, databases such as the Hazardous Substances Data Bank (HSDB), which contains summaries of peer-reviewed literature, and the Registry of Toxic Effects of Chemical Substances (RTECS), which lists toxic effects of chemicals and is not peer reviewed, were used. Each bulleted piece of information on the fact sheet contains one or more reference numbers after it which correspond to the numbered references at the end of each fact sheet. Complete reference information is provided in the reference section of each fact sheet. When available, numerical data are presented in the fact sheets. The numerical data presented are primarily those numbers that are found in the IRIS database. IRIS numbers are EPA- verified values; i.e, they have been subjected to extensive review by EPA scientists and a consensus was reached on their validity. These numbers include the Oral Reference Dose (RfD) and the Inhalation Reference Concentration (RfC) (see the Chronic Effects section) and the risk specific dose (see the Cancer Risk section). In addition, some numbers are presented that are not on the IRIS database; these numbers have not been subjected to the same degree of review and consensus as the IRIS values. These values are "provisional" RfDs and "provisional" RfCs (see the Chronic Effects section) and may be found in EPA's HEAST document. For some chemicals, numerical data are not available either on IRIS or in the HEAST document. The fact sheets for these chemicals simply present the available qualitative information. The quality and decisiveness of the knowledge base underlying each of the agents portrayed in the fact sheets vary according to the abundance or paucity of high-quality health science data. The strength or confidence in particular hazard conclusions or inferences similarly varies according to the amount and quality of data and also according to the inherent methodologic generated uncertainties that go along with health hazard assessment. The overall effect of these circumstances is that each agent has its unique combination of uncertainty elements that are not explicitly listed in the fact sheets. A responsible user of these fact sheets must appreciate the implications of the underlying uncertainties, which take on more or less meaning depending on how the fact sheets are used. The fact sheets focus on the health effects of each chemical in humans and laboratory animals (mammals). No information is presented on the ecological effects of the chemicals or the health effects in nonmammalian species. The ecological effects from exposure to toxic chemicals are an important area that EPA is currently addressing

It depends whether a certain pda model is available in your country. Ask yourself, how much is the budget? what re the features that would be very useful to you? =D

I think a notebook is more useful. When I want to use it away from home, I go to a cafe with a hotspot or a freespot, and use it there.

it depend whether a certain pda model is available in your country.

depends on your need, if you already have a PC at home there is no need to buy noteboot but if you travel around and need PC then buy notebook. recently i buy a PDA, Dopod D810 because i need to write down all my activities including schedule meeting, reminders.